<?xml version="1.0" encoding="UTF-8"?>
<?xml-stylesheet type="text/xsl" href="f1.xsl"?>
<top_article>
 <mrnumber>MR0245915</mrnumber>
 <author>Wong, James S. W.</author>
 <author_utf8>James S. W. WONG</author_utf8>
 <title>On second order nonlinear oscillation</title>
 <journal>Funkcialaj Ekvacioj. Serio Internacia</journal>
 <volume>11</volume>
 <year>1969</year>
 <page>207--234</page>
 <url_pdf>http://fe.math.kobe-u.ac.jp/FE/Free/vol11/fe11-17.pdf</url_pdf>
 <url_infty_pdf>http://fe.math.kobe-u.ac.jp/FE/FE_pdf_with_bookmark/FE11-20-en_KML/fe11-207-234/fe11-207-234.pdf</url_infty_pdf>
 <mathsci_link> http://www.ams.org/mathscinet-getitem?mr=MR0245915</mathsci_link>
<fesi_info>
  <FILE>fe11-207-234</FILE>
  <YEAR>1969</YEAR>
  <TITLE>On Second Order Nonlinear Oscillation</TITLE>
  <AUTHOR>WONG, James S. W.</AUTHOR>
  <AUTHOR_utf8>WONG, James S. W.</AUTHOR_utf8>
</fesi_info>

<references>
  <article>
    <bibitem>1</bibitem>
    <author>Atkinson, F. V.</author>
    <title>On second-order non-linear oscillation</title>
    <journal>Pacific J. Math.</journal>
    <vol>5</vol>
    <year>1955</year>
    <page>643-647</page>
    <mr>MR0072316</mr>
  </article>

  <book>
    <bibitem>2</bibitem>
    <author>Bellman, R.</author>
    <booktitle>Stability Theory of Differential Equations</booktitle>
    <publisher>McGraw-Hill, New York.</publisher>
    <year>1953</year>
    <mr>MR0061235</mr>
    <score>100</score>
    <query_string>Cache/Be/Bellman,Stability,*,1953,1954</query_string>
    <page>xiii+166</page>
  </book>

  <article>
    <bibitem>3</bibitem>
    <author>Belohorec, S.</author>
    <title>Neoscilatoricke rie&#353;enia istej nelin&#233;arnej diferenci&#224;lnej rownice druh&#233;ho radu</title>
    <journal>Mat. Fyz. &#269;asop. Slovez Akad. Viad</journal>
    <vol>12</vol>
    <year>1962</year>
    <page>253-262</page>
    <mr>MR0159994</mr>
    <query_string>Cache/Be/Belohorec,Neoscilatoricke,Mat*,1962,1963</query_string>
  </article>

  <article>
    <bibitem>4</bibitem>
    <author>Bhatia, N. P.</author>
    <title>Some oscillation theorems for second order differential equations</title>
    <journal>J. Math. Anal., Appl.</journal>
    <vol>15</vol>
    <year>1966</year>
    <page>442-446</page>
    <mr>MR0203164</mr>
    <score>100</score>
    <query_string>Cache/Bh/Bhatia,oscillation,J*,1966,1967</query_string>
  </article>

  <article>
    <bibitem>5</bibitem>
    <author>Bihari, I.</author>
    <title>A generalization of a lemma of Bellman and its application to uniqueness problems of differential equations</title>
    <journal>Acta Math. Sci. Hungar.</journal>
    <vol>7</vol>
    <year>1956</year>
    <page>81-94</page>
    <mr>MR0079154</mr>
    <score>100</score>
    <query_string>Cache/Bi/Bihari,generalization,Acta*,1956,1957</query_string>
  </article>

  <article>
    <bibitem>6</bibitem>
    <author>Bihari, I.</author>
    <title>Ausdehnung der Sturmschen Oscillations and Vergleichssatze auf die Losungen gewisser nicht-linear differential-gleichungen zweiter ordnung</title>
    <journal>Magyar Tud. Acad. Mat. Kutato Int. K&#246;zl</journal>
    <vol>2</vol>
    <year>1957</year>
    <page>159-173</page>
    <mr>MR0103322</mr>
    <query_string>Cache/Bi/Bihari,differential-gleichungen,Magyar*,1957,1958</query_string>
  </article>

  <article>
    <bibitem>7</bibitem>
    <author>Bihari, I.</author>
    <title>Extension of certain theorems of the Sturmian type to non-linear second order differential equations</title>
    <journal>Magyar Tud. Acad. Mat. Kutato Int. Kozl</journal>
    <vol>3</vol>
    <year>1958</year>
    <page>13-20</page>
    <mr>MR0103321</mr>
    <query_string>Cache/Bi/Bihari,non-linear,Magyar*,1958,1959</query_string>
  </article>

  <article>
    <bibitem>8</bibitem>
    <author>Bihari, I.</author>
    <title>Oscillation and monotonity theorems concerning nonlinear differential equations of the second order</title>
    <journal>Acta Math. Sci. Hungar.</journal>
    <vol>9</vol>
    <year>1958</year>
    <page>83-104</page>
    <mr>MR0095321</mr>
    <score>91</score>
    <query_string>Cache/Bi/Bihari,Oscillation,Acta*,1958,1959</query_string>
  </article>

  <other>
    <bibitem>9</bibitem>
    <raw_data>Brauer, F.; Wong, J. S. W., On the asymptotic behavior of perturbed linear systems, J. Diff. Eqn. (to appear)</raw_data>
    <mr>MR0239213</mr>
  </other>

  <article>
    <bibitem>10</bibitem>
    <author>Coffman, C. V.; Ullrich, D. F.</author>
    <title>On the continuation of solutions of a certain nonlinear differential equation</title>
    <journal>Monatsh. Math.</journal>
    <vol>71</vol>
    <year>1967</year>
    <page>385-392</page>
    <mr>MR0227494</mr>
    <score>90</score>
    <query_string>Cache/Co/Coffman,continuation,Monatsh*,1967,1968</query_string>
  </article>

  <article>
    <bibitem>11</bibitem>
    <author>Coles, W. J.</author>
    <title>An oscillation criterion for second-order linear differential equations</title>
    <journal>Proc. Amer. Math. Soc.</journal>
    <vol>19</vol>
    <year>1968</year>
    <page>755-759</page>
    <not_found>Data is not found in MathSci.</not_found>
    <query_string>Cache/Co/Coles,second-order,Proc*,1968,1969</query_string>
  </article>

  <other>
    <bibitem>12</bibitem>
    <raw_data>Coles, W. J.; Willett, D., Summability Criteria for oscillation of second order linear differential equations, Annali di Matematica (to appear)</raw_data>
    <mr>MR0236462</mr>
  </other>

  <article>
    <bibitem>13</bibitem>
    <author>Conti, R.; Graffi, D.; Sansone, G.</author>
    <title>The Italian contribution to the theory of nonlinear ordinary differential equations and to nonlinear mechanics during the years 1951-1961</title>
    <journal>Qualitative methods in the theory of Nonlinear vibrations, Proc. Int. Sympos. Nonlinear Vibrations II</journal>
    <year>1961</year>
    <page>172-189</page>
    <mr>MR0183915</mr>
    <score>84</score>
    <query_string>Cache/Co/Conti,contribution,*,1961,1962</query_string>
  </article>

  <book>
    <bibitem>14</bibitem>
    <author>Coppel, W. A.</author>
    <booktitle>Stability and Asymptotic Behavior of Differential Equations</booktitle>
    <publisher>Heath, Boston</publisher>
    <year>1965</year>
    <mr>MR0190463</mr>
    <score>100</score>
    <query_string>Cache/Co/Coppel,Asymptotic,*,1965,1966</query_string>
    <page>viii+166</page>
  </book>

  <article>
    <bibitem>15</bibitem>
    <author>Das, D. M.</author>
    <title>Properties of solutions of certain nonlinear differential equations</title>
    <journal>J. Math. Anal. Appl.</journal>
    <vol>8</vol>
    <year>1964</year>
    <page>445-452</page>
    <mr>MR0160985</mr>
    <score>100</score>
    <query_string>Cache/Da/Das,Properties,J*,1964,1965</query_string>
  </article>

  <article>
    <bibitem>16</bibitem>
    <author>Fite, W. B.</author>
    <title>Concerning the zeros of the solution of certain differential equations</title>
    <journal>Trans. Amer. Math. Soc</journal>
    <vol>19</vol>
    <year>1918</year>
    <page>341-352</page>
    <mr>MR1501107</mr>
    <score>90</score>
    <query_string>Cache/Fi/Fite,Concerning,Trans*,1918,1919</query_string>
  </article>

  <article>
    <bibitem>17</bibitem>
    <author>Golomb, M.</author>
    <title>Bounds for solutions of nonlinear differential stsytems</title>
    <journal>Archive Rat. Mech. Anal</journal>
    <vol>1</vol>
    <year>1958</year>
    <page>272-282</page>
    <mr>MR0104015</mr>
    <score>85</score>
    <query_string>Cache/Go/Golomb,solutions,Archive*,1958,1959</query_string>
  </article>

  <article>
    <bibitem>18</bibitem>
    <author>Hallam, T. G.</author>
    <title>Asymptotic behavior of the solutions of an nth order nonhomogeneous ordinary differential equations</title>
    <journal>Trans. Amer. Math. Soc.</journal>
    <vol>122</vol>
    <year>1966</year>
    <page>177-194</page>
    <mr>MR0188562</mr>
    <score>92</score>
    <query_string>Cache/Ha/Hallam,nonhomogeneous,Trans*,1966,1967</query_string>
  </article>

  <article>
    <bibitem>19</bibitem>
    <author>Hallam, T. G.</author>
    <title>Asymptotic expansions in a nonhomogeneous differential equation</title>
    <journal>Proc. Amer. Math. Socl</journal>
    <vol>18</vol>
    <year>1967</year>
    <page>432-438</page>
    <mr>MR0212292</mr>
    <score>100</score>
    <query_string>Cache/Ha/Hallam,nonhomogeneous,Proc*,1967,1968</query_string>
  </article>

  <other>
    <bibitem>20</bibitem>
    <raw_data>Hallam, T. G., Asymptotic expansions for the solutions of a class of nonhomogeneous differential equations, (to appear)</raw_data>
    <mr>MR0237884</mr>
  </other>

  <article>
    <bibitem>21</bibitem>
    <author>Hartman, P.</author>
    <title>On linear second order differential equations with small coefficients</title>
    <journal>Amer. J. Math.</journal>
    <vol>73</vol>
    <year>1951</year>
    <page>955-962</page>
    <mr>MR0045896</mr>
    <score>100</score>
    <query_string>Cache/Ha/Hartman,linear,Amer*,1951,1952</query_string>
  </article>

  <article>
    <bibitem>22</bibitem>
    <author>Hartman, P.</author>
    <title>On non-oscillatory linear differential equations of second order</title>
    <journal>Amer. J. Amth.</journal>
    <vol>74</vol>
    <year>1952</year>
    <page>389-400</page>
    <mr>MR0048667</mr>
    <score>100</score>
    <query_string>Cache/Ha/Hartman,non-oscillatory,Amer*,1952,1953</query_string>
  </article>

  <book>
    <bibitem>23</bibitem>
    <author>Hartman, P.</author>
    <booktitle>Ordinary Differential Equations</booktitle>
    <publisher>John Wiley, New York</publisher>
    <year>1964</year>
    <mr>MR0171038</mr>
    <score>100</score>
    <query_string>Cache/Ha/Hartman,Ordinary,*,1964,1965</query_string>
    <page>xiv+612</page>
  </book>

  <article>
    <bibitem>24</bibitem>
    <author>Hartman, P.; Wintner, A.</author>
    <title>On the nonincreasing solutions of $y''=f(x,y,y')$</title>
    <journal>Amer. J. Math.</journal>
    <vol>73</vol>
    <year>1951</year>
    <page>390-404</page>
    <mr>MR0042004</mr>
    <query_string>Cache/Ha/Hartman,nonincreasing,Amer*,1951,1952</query_string>
  </article>

  <article>
    <bibitem>25</bibitem>
    <author>Hastings, S. P.</author>
    <title>Boundary Value Problems in one differential equation with a discontinuity</title>
    <journal>J. Diff. Eqn.</journal>
    <vol>1</vol>
    <year>1965</year>
    <page>346-369</page>
    <mr>MR0180723</mr>
    <score>100</score>
    <query_string>Cache/Ha/Hastings,discontinuity,J*,1965,1966</query_string>
  </article>

  <article>
    <bibitem>26</bibitem>
    <author>Hille, E.</author>
    <title>Non-oscillation Theorems</title>
    <journal>Trans. Amer. Math. Soc.</journal>
    <vol>64</vol>
    <year>1948</year>
    <page>234-252</page>
    <mr>MR0027925</mr>
    <query_string>Cache/Hi/Hille,Nonoscillation,Trans*,1948,1949</query_string>
  </article>

  <article>
    <bibitem>27</bibitem>
    <author>Howard, H. C.</author>
    <title>Oscillation and nonoscillation criteria for $y''+f(y(x))p(x)=0$</title>
    <journal>Pacific J. Math.</journal>
    <vol>12</vol>
    <year>1962</year>
    <page>243-251</page>
    <mr>MR0145150</mr>
    <query_string>Cache/Ho/Howard,y''+f(y(x))p(x)=0,Pacific*,1962,1963</query_string>
  </article>

  <article>
    <bibitem>28</bibitem>
    <author>Jasny, M.</author>
    <title>On the existence of an oscillating solution of the nonlinear differential equation of the second order $y''+f(x)y^{2n-1}=0$</title>
    <journal>Casopis Pestovani Matematiky</journal>
    <vol>85</vol>
    <year>1960</year>
    <page>78-83</page>
    <mr>MR0142840</mr>
    <query_string>Cache/Ja/Jasny,y''+f(x)y^2n-1=0,Casopis*,1960,1961</query_string>
  </article>

  <article>
    <bibitem>29</bibitem>
    <author>Jones, J. Jr.</author>
    <title>On the extension of a theorem of Atkinson</title>
    <journal>Quart. J. Math.</journal>
    <vol>7</vol>
    <year>1956</year>
    <page>306-309</page>
    <mr>MR0096868</mr>
    <score>87</score>
    <query_string>Cache/Jo/Jones,extension,Quart*,1956,1957</query_string>
  </article>

  <article>
    <bibitem>30</bibitem>
    <author>Jones, J. Jr.</author>
    <title>On nonlinear second order differential equation</title>
    <journal>Proc. Amer. Math. Soc.</journal>
    <vol>9</vol>
    <year>1958</year>
    <page>586-588</page>
    <mr>MR0104878</mr>
    <score>83</score>
    <query_string>Cache/Jo/Jones,nonlinear,Proc*,1958,1959</query_string>
  </article>

  <article>
    <bibitem>31</bibitem>
    <author>Kurzweil, J.</author>
    <title>A note on oscillatory solution of equation $y''+f(x)y^{2n-1}=0$</title>
    <journal>Casopis Pestovani Matematiky</journal>
    <vol>85</vol>
    <year>1960</year>
    <page>357-358</page>
    <mr>MR0126025</mr>
  </article>

  <article>
    <bibitem>32</bibitem>
    <author>Leighton, W.</author>
    <title>The detection of the oscillation of solutions of a second order linear differential equation</title>
    <journal>Duke Math. J.</journal>
    <vol>17</vol>
    <year>1950</year>
    <page>57-62</page>
    <mr>MR0032065</mr>
    <score>100</score>
    <query_string>Cache/Le/Leighton,oscillation,Duke*,1950,1951</query_string>
  </article>

  <article>
    <bibitem>33</bibitem>
    <author>Leighton, W.</author>
    <title>On self-adjoint differential equations of second order</title>
    <journal>J. London Math. Soc.</journal>
    <vol>27</vol>
    <year>1952</year>
    <page>37-47</page>
    <mr>MR0046506</mr>
    <score>100</score>
    <query_string>Cache/Le/Leighton,self-adjoint,J*,1952,1953</query_string>
  </article>

  <article>
    <bibitem>34</bibitem>
    <author>Locke, P.</author>
    <title>On the asymptotic behavior of solutions of an nth order nonlinear equation</title>
    <journal>Proc. Amer. Math. Soc.</journal>
    <vol>18</vol>
    <year>1967</year>
    <page>383-390</page>
    <mr>MR0212293</mr>
    <score>83</score>
    <query_string>Cache/Lo/Locke,asymptotic,Proc*,1967,1968</query_string>
  </article>

  <article>
    <bibitem>35</bibitem>
    <author>Macki, J. W.; Wong, J. S. W.</author>
    <title>Oscillation of solutions to second order nonlinear differential equation</title>
    <journal>Pacific J. Math.</journal>
    <vol>24</vol>
    <year>1968</year>
    <page>111-117</page>
    <mr>MR0224908</mr>
    <score>75</score>
    <query_string>Cache/Ma/Macki,Oscillation,Pacific*,1968,1969</query_string>
  </article>

  <other>
    <bibitem>36</bibitem>
    <raw_data>Macki, J. W.; Wong, J. S. W., Oscillation Criteria for linear second order ordinary differential equations, Proc. Amer. Math. Soc., 20 (1969) (in press)</raw_data>
    <mr>MR0235202</mr>
  </other>

  <article>
    <bibitem>37</bibitem>
    <author>Milne, W. E.</author>
    <title>A theorem on oscillation</title>
    <journal>Bull. Amer. Math. Soc.</journal>
    <vol>28</vol>
    <year>1922</year>
    <page>102-104</page>
    <not_found>Data is not found in MathSci.</not_found>
    <query_string>Cache/Mi/Milne,oscillation,Bull*,1922,1923</query_string>
  </article>

  <article>
    <bibitem>38</bibitem>
    <author>Moore, R. A.</author>
    <title>The behavior of solutions of a linear differential equation of second order</title>
    <journal>Pacific J. Math.</journal>
    <vol>5</vol>
    <year>1955</year>
    <page>125-145</page>
    <mr>MR0068690</mr>
    <score>100</score>
    <query_string>Cache/Mo/Moore,solutions,Pacific*,1955,1956</query_string>
  </article>

  <article>
    <bibitem>39</bibitem>
    <author>Moore, R. A.; Nehari, Z.</author>
    <title>Nonoscillation theorems for a class of nonlinear differential equation</title>
    <journal>Trans. Amer. Math. Soc.</journal>
    <vol>93</vol>
    <year>1959</year>
    <page>30-52</page>
    <mr>MR0111897</mr>
    <query_string>Cache/Mo/Moore,Non-oscillation,Trans*,1959,1960</query_string>
  </article>

  <article>
    <bibitem>40</bibitem>
    <author>Moroney, R. M.</author>
    <title>Note on a theorem of Nehari</title>
    <journal>Proc. Amer. Math. Soc.</journal>
    <vol>13</vol>
    <year>1962</year>
    <page>407-410</page>
    <mr>MR0148983</mr>
    <score>100</score>
    <query_string>Cache/Mo/Moroney,theorem,Proc*,1962,1963</query_string>
  </article>

  <article>
    <bibitem>41</bibitem>
    <author>Muldowney, J. S.; Wong, J. S. W.</author>
    <title>Bounds for solutions of a nonlinear integrodifferential equations</title>
    <journal>J. of Math. Anal. and Appl</journal>
    <vol>23</vol>
    <year>1968</year>
    <page>487-499</page>
    <mr>MR0238051</mr>
    <score>100</score>
    <query_string>Cache/Mu/Muldowney,integrodifferential,J*,1968,1969</query_string>
  </article>

  <article>
    <bibitem>42</bibitem>
    <author>Nehari, Z.</author>
    <title>On a class of nonlinear second order differential equations</title>
    <journal>Trans. Amer. Math. Soc.</journal>
    <vol>95</vol>
    <year>1960</year>
    <page>101-123</page>
    <mr>MR0111898</mr>
    <score>87</score>
    <query_string>Cache/Ne/Nehari,nonlinear,Trans*,1960,1961</query_string>
  </article>

  <article>
    <bibitem>43</bibitem>
    <author>Nehari, Z.</author>
    <title>Characteristic values associated with a class of nonlinear second order differential equations</title>
    <journal>Acta Math.</journal>
    <vol>105</vol>
    <year>1961</year>
    <page>141-175</page>
    <mr>MR0123775</mr>
    <score>81</score>
    <query_string>Cache/Ne/Nehari,Characteristic,Acta*,1961,1962</query_string>
  </article>

  <article>
    <bibitem>44</bibitem>
    <author>Osgood, W. F.</author>
    <title>On a theorem of oscillation</title>
    <journal>Bull. Amer. Math. Soc.</journal>
    <vol>25</vol>
    <year>1919</year>
    <page>216-221</page>
    <not_found>Data is not found in MathSci.</not_found>
    <query_string>Cache/Os/Osgood,oscillation,Bull*,1919,1920</query_string>
  </article>

  <article>
    <bibitem>45</bibitem>
    <author>Pinter, L.</author>
    <title>Oszillationssatze fur einen Typ von nichtlinearen Differentialgleichungen zweiter ordnung</title>
    <journal>Magyar Tud. Acad. Mat. Kutato Int. K&#246;zl.</journal>
    <vol>6</vol>
    <year>1961</year>
    <page>333-350</page>
    <mr>MR0148998</mr>
    <query_string>Cache/Pi/Pinter,Differentialgleichungen,Magyar*,1961,1962</query_string>
  </article>

  <article>
    <bibitem>46</bibitem>
    <author>Petropavlovskaya, R. V.</author>
    <title>On the oscillatory aspect of solutions of the differential equation $u''=f(u,u',t)$</title>
    <journal>Dokl. Akad. Nauk SSR</journal>
    <vol>108</vol>
    <year>1956</year>
    <page>389-391</page>
    <mr>MR0083631</mr>
    <score>100</score>
    <query_string>Cache/Pe/Petropavlovskaya,u''=f(u,u',t),Dokl*,1956,1957</query_string>
  </article>

  <article>
    <bibitem>47</bibitem>
    <author>Shevelo, V. N.</author>
    <title>Problems, methods, and fundamental results in the theory of oscillation of solutions of nonlinear non-autonomous ordinary differential equations</title>
    <journal>Proceedings of the 2 nd All-Union Conference on Theoretical and Applied Mechanics, Moscow</journal>
    <year>1965</year>
    <page>142-157</page>
    <not_found>Data is not found in MathSci.</not_found>
    <query_string>Cache/Sh/Shevyelo,non-autonomous,*,1965,1966</query_string>
  </article>

  <article>
    <bibitem>48</bibitem>
    <author>Shevelo, V. N.; Shtelik, V. G.</author>
    <title>Certain problems concerning the oscillation of solutions of nonlinear non-autonomous second order equations</title>
    <journal>Dokl. Akad. Nauk SSSR</journal>
    <vol>149</vol>
    <year>1963</year>
    <page>276-279</page>
    <mr>MR0150387</mr>
    <query_string>Cache/Sh/Shevyelo,non-autonomous,Dokl*,1963,1964</query_string>
  </article>

  <article>
    <bibitem>49</bibitem>
    <author>Taam, C. T.</author>
    <title>An extension of Osgood's oscillation theorem for a nonlinear differential equation</title>
    <journal>Proc. Amer. Math. Soc.</journal>
    <vol>5</vol>
    <year>1954</year>
    <page>705-715</page>
    <mr>MR0067286</mr>
    <query_string>Cache/Ta/Taam,oscillation,Proc*,1955,1956</query_string>
  </article>

  <article>
    <bibitem>50</bibitem>
    <author>Tomastik, E. C.</author>
    <title>Oscillation of a nonlinear second order differential equation</title>
    <journal>SIAM J.</journal>
    <vol>15</vol>
    <year>1967</year>
    <page>1275-1277</page>
    <mr>MR0226115</mr>
    <score>100</score>
    <query_string>Cache/To/Tomastik,Oscillation,SIAM*,1967,1968</query_string>
  </article>

  <article>
    <bibitem>51</bibitem>
    <author>Utz, W. R.</author>
    <title>Properties of solutions of $u''+g(t)u^{2n-1}=0$</title>
    <journal>Monatsh. Math</journal>
    <vol>66</vol>
    <year>1962</year>
    <page>55-60</page>
    <mr>MR0138834</mr>
    <query_string>Cache/Ut/Utz,u''+g(t)u^2n-1=0,Monatsh*,1962,1963</query_string>
  </article>

  <article>
    <bibitem>52</bibitem>
    <author>Utz, W. R.</author>
    <title>Properties of solutions of $u''+g(t)u^{2n-1}=0$, II</title>
    <journal>Monatsh. Math.</journal>
    <vol>69</vol>
    <year>1965</year>
    <page>353-361</page>
    <mr>MR0193334</mr>
    <query_string>Cache/Ut/Utz,u''+g(t)u^2n-1=0,,Monatsh*,1965,1966</query_string>
  </article>

  <article>
    <bibitem>53</bibitem>
    <author>Waltman, P.</author>
    <title>Some Properties of solutions of $u''+a(t)f(u)=0$</title>
    <journal>Monatsh. Math.</journal>
    <vol>67</vol>
    <year>1963</year>
    <page>50-54</page>
    <mr>MR0147700</mr>
    <query_string>Cache/Wa/Waltman,u''+a(t)f(u)=0,Monatsh*,1963,1964</query_string>
  </article>

  <article>
    <bibitem>54</bibitem>
    <author>Waltman, P.</author>
    <title>Oscillation of solutions of a nonlinear equation</title>
    <journal>SIAM Review</journal>
    <vol>5</vol>
    <year>1963</year>
    <page>128-130</page>
    <mr>MR0152706</mr>
    <score>100</score>
    <query_string>Cache/Wa/Waltman,Oscillation,SIAM*,1963,1964</query_string>
  </article>

  <article>
    <bibitem>55</bibitem>
    <author>Waltman, P.</author>
    <title>On the asymptotic behavior of solutions of a nonlinear equation</title>
    <journal>Proc. Amer. Math. Soc.</journal>
    <vol>15</vol>
    <year>1964</year>
    <page>918-923</page>
    <mr>MR0176170</mr>
    <score>100</score>
    <query_string>Cache/Wa/Waltman,asymptotic,Proc*,1964,1965</query_string>
  </article>

  <article>
    <bibitem>56</bibitem>
    <author>Waltman, P.</author>
    <title>An oscillation criterion for a nonlinear second order equation</title>
    <journal>J. Math. Anal. and Appl.</journal>
    <vol>10</vol>
    <year>1965</year>
    <page>439-441</page>
    <mr>MR0173050</mr>
    <score>100</score>
    <query_string>Cache/Wa/Waltman,oscillation,J*,1965,1966</query_string>
  </article>

  <article>
    <bibitem>57</bibitem>
    <author>Waltman, P.</author>
    <title>On the asymptotic behavior of solutions of an $n$th order equation</title>
    <journal>Monatsh. Math.</journal>
    <vol>69</vol>
    <year>1965</year>
    <page>427-430</page>
    <mr>MR0185217</mr>
    <score>83</score>
    <query_string>Cache/Wa/Waltman,asymptotic,Monatsh*,1965,1966</query_string>
  </article>

  <other>
    <bibitem>58</bibitem>
    <raw_data>Willett, D., On the oscillatory behavior of the solutions of second order linear differential equation, Ann. Polonici Math. (to appear)</raw_data>
    <mr>MR0249723</mr>
  </other>

  <article>
    <bibitem>59</bibitem>
    <author>Willett, D.; Wong, J. S. W.</author>
    <title>Some properties of the solutions of $(p(t)x')'+q(t)f(x)=0$</title>
    <journal>J. Math. Anal. and Appl.</journal>
    <vol>23</vol>
    <year>1968</year>
    <page>15-24</page>
    <mr>MR0226117</mr>
    <query_string>Cache/Wi/Willett,(p(t)x')'+q(t)f(x)=0,J*,1968,1969</query_string>
  </article>

  <article>
    <bibitem>60</bibitem>
    <author>Wintner, A.</author>
    <title>On the Laplace-Fourier transcendents occurring in mathematical physics</title>
    <journal>Amer. J. Math.</journal>
    <vol>69</vol>
    <year>1947</year>
    <page>87-97</page>
    <mr>MR0019182</mr>
    <score>100</score>
    <query_string>Cache/Wi/Wintner,Laplace-Fourier,Amer*,1947,1948</query_string>
  </article>

  <article>
    <bibitem>61</bibitem>
    <author>Wintner, A.</author>
    <title>A criterion of oscillatory stability</title>
    <journal>Quart. J. Appl. Math.</journal>
    <vol>7</vol>
    <year>1949</year>
    <page>115-117</page>
    <mr>MR0028499</mr>
    <score>100</score>
    <query_string>Cache/Wi/Wintner,oscillatory,Quart*,1949,1950</query_string>
  </article>

  <article>
    <bibitem>62</bibitem>
    <author>Wintner, A.</author>
    <title>On the non-existence of conjugate points</title>
    <journal>Amer. J. Math</journal>
    <vol>73</vol>
    <year>1951</year>
    <page>368-380</page>
    <mr>MR0042005</mr>
    <score>100</score>
    <query_string>Cache/Wi/Wintner,non-existence,Amer*,1951,1952</query_string>
  </article>

  <article>
    <bibitem>64</bibitem>
    <author>Wong, J. S. W.; Burton, T. A.</author>
    <title>Some properties of solutions of $u''(t)+a(t)f(u)g(u')=0$, II</title>
    <journal>Monatsh. Math.</journal>
    <vol>69</vol>
    <year>1965</year>
    <page>368-374</page>
    <mr>MR0186885</mr>
    <query_string>Cache/Wo/Wong,u''(t)+a(t)f(u)g(u')=0,,Monatsh*,1965,1966</query_string>
  </article>

  <article>
    <bibitem>64</bibitem>
    <author>Wong, J. S. W.</author>
    <title>A note on boundedness theorems of certain second order differential equations</title>
    <journal>SIAM Review</journal>
    <vol>6</vol>
    <year>1964</year>
    <page>175-176</page>
    <mr>MR0170067</mr>
    <score>100</score>
    <query_string>Cache/Wo/Wong,boundedness,SIAM*,1964,1965</query_string>
  </article>

  <article>
    <bibitem>65</bibitem>
    <author>Wong, J. S. W.</author>
    <title>Some properties of solutions of $u''(t)+a(t)f(u)g(u')=0$, III</title>
    <journal>SIAM Journal</journal>
    <vol>14</vol>
    <year>1966</year>
    <page>209-214</page>
    <mr>MR0203167</mr>
    <query_string>Cache/Wo/Wong,u''(t)+a(t)f(u)g(u')=0,,SIAM*,1966,1967</query_string>
  </article>

  <article>
    <bibitem>66</bibitem>
    <author>Wong, J. S. W.</author>
    <title>On two theorems of Waltman</title>
    <journal>SIAM Journal</journal>
    <vol>14</vol>
    <year>1966</year>
    <page>724-728</page>
    <mr>MR0206409</mr>
    <score>100</score>
    <query_string>Cache/Wo/Wong,theorems,SIAM*,1966,1967</query_string>
  </article>

  <article>
    <bibitem>67</bibitem>
    <author>Wong, J. S. W.</author>
    <title>Explicit Bounds for solutions of certain second order nonlinear equations</title>
    <journal>J. Math. Anal. Appl.</journal>
    <vol>17</vol>
    <year>1967</year>
    <page>339-342</page>
    <mr>MR0206395</mr>
    <score>90</score>
    <query_string>Cache/Wo/Wong,solutions,J*,1967,1968</query_string>
  </article>

  <article>
    <bibitem>68</bibitem>
    <author>Wong, J. S. W.</author>
    <title>Boundedness Theorems for solutions of $u''(t)+a(t)f(u)g(u')=0$, IV</title>
    <journal>L'enseignment Mathematique</journal>
    <vol>XIII</vol>
    <year>1967</year>
    <page>157-165</page>
    <mr>MR0234059</mr>
    <query_string>Cache/Wo/Wong,u''(t)+a(t)f(u)g(u')=0,,L'enseignment*,1967,1968</query_string>
  </article>

  <article>
    <bibitem>69</bibitem>
    <author>Wong, J. S. W.</author>
    <title>A note on second order nonlinear oscillation</title>
    <journal>SIAM Review</journal>
    <vol>10</vol>
    <year>1968</year>
    <page>88-91</page>
    <mr>MR0227525</mr>
    <score>100</score>
    <query_string>Cache/Wo/Wong,oscillation,SIAM*,1968,1969</query_string>
  </article>

  <article>
    <bibitem>70</bibitem>
    <author>Wong, J. S. W.</author>
    <title>Remarks on the asymptotic behavior of certain perturbed linear systems</title>
    <journal>Glasgow Math. J.</journal>
    <page>84</page>
    <mr>MR0257491</mr>
    <score>90</score>
    <query_string>Cache/Wo/Wong,asymptotic,Glasgow*,1963,1973</query_string>
    <year>1970</year>
  </article>

  <article>
    <bibitem>71</bibitem>
    <author>Wong, J. S. W.</author>
    <title>Second order linear oscillation with integrable coefficients</title>
    <journal>Bull. Amer. Math. Soc.</journal>
    <vol>74</vol>
    <year>1968</year>
    <page>909-911</page>
    <mr>MR0233010</mr>
    <score>100</score>
    <query_string>Cache/Wo/Wong,coefficients,Bull*,1968,1969</query_string>
  </article>

  <other>
    <bibitem>72</bibitem>
    <raw_data>Wong, J. S. W., On the oscillatory behavior of solutions of second order linear differential equations with integrable coefficients, CMU Report 68-33 (to appear)</raw_data>
    <mr_guess>MR0330708</mr_guess>
  </other>

  <article>
    <bibitem>1</bibitem>
    <author>Belohorec, S.</author>
    <title>On some properties of the equation $y''(x)+f(x)y^\alpha(x)=0$</title>
    <journal>Mat. Casopis Sloven, Akad. Vied.</journal>
    <vol>17</vol>
    <year>1967</year>
    <page>10-19</page>
    <mr>MR0214854</mr>
  </article>

  <article>
    <bibitem>2</bibitem>
    <author>Bihari, I.</author>
    <title>An oscillation theorem concerning the halflinear differential equation of the second order</title>
    <journal>Magyar Tud. Akad. Mat. Kutato Int. Kozl.</journal>
    <vol>8</vol>
    <year>1963</year>
    <page>275-280</page>
    <mr>MR0171959</mr>
    <score>90</score>
    <query_string>Cache/Bi/Bihari,oscillation,Magyar*,1963,1964</query_string>
  </article>

  <other>
    <bibitem>3</bibitem>
    <raw_data>Coffman, C. V.; Wong, J. S. W., On a second order nonlinear oscillation problem, CMU Report 69-2, (to appear)</raw_data>
    <mr>MR0257473</mr>
  </other>

  <other>
    <bibitem>4</bibitem>
    <raw_data>Coles, W. J., Oscillation criteria for nonlinear second order equations, (to appear)</raw_data>
    <mr>MR0255907</mr>
  </other>

  <other>
    <bibitem>5</bibitem>
    <raw_data>Erbe, L. H., Nonoscillatory solutions of second order non-linear differential equations, Pacific J. Math. (to appear)</raw_data>
    <mr>MR0237872</mr>
  </other>

  <other>
    <bibitem>6</bibitem>
    <raw_data>Heidel, J. W., A nonoscillation theorem for a nonlinear second order differential equation, (to appear)</raw_data>
    <mr>MR0248396</mr>
  </other>

  <article>
    <bibitem>7</bibitem>
    <author>Izjumova, D. V.</author>
    <title>On conditions for oscillation and non-oscillation for solutions of a non-linear differential equation of the second order</title>
    <journal>Differential Equations</journal>
    <vol>12</vol>
    <year>1966</year>
    <page>1572-1586 (Russian)</page>
    <mr>MR0209579</mr>
    <query_string>Cache/Iz/Izuniova,non-oscillation,Differential*,1966,1967</query_string>
  </article>

  <article>
    <bibitem>8</bibitem>
    <author>Kartsatos, A. G.</author>
    <title>Some theorems on oscillation of certain non-linear second order differential equations</title>
    <journal>Arch. der Math.</journal>
    <vol>XVIII</vol>
    <year>1967</year>
    <page>425-429</page>
    <mr>MR0221018</mr>
    <score>72</score>
    <query_string>Cache/Ka/Kartsatos,oscillation,Arch*,1967,1968</query_string>
  </article>

  <article>
    <bibitem>9</bibitem>
    <author>Kartsatos, A. G.</author>
    <title>On oscillations of non-linear equations of second order</title>
    <journal>J. Math. Anal. and Appl.</journal>
    <vol>24</vol>
    <year>1968</year>
    <mr>MR0237873</mr>
    <score>87</score>
    <query_string>Cache/Ka/Kartsatos,oscillations,J*,1968,1969</query_string>
    <page>665-668</page>
  </article>

  <article>
    <bibitem>10</bibitem>
    <author>Kiguradze, I. T.</author>
    <title>On conditions for oscillation of solutions of the equation $u''+a(t)|u|^n\mathrm{sgn}u=0$</title>
    <journal>Casopis Pestovani Matematiky</journal>
    <vol>87</vol>
    <year>1962</year>
    <page>492-495 (Russian)</page>
    <mr>MR0181800</mr>
    <query_string>Cache/Ki/Kiguradze,u''+a(t)|u|^nsgnu=0,Casopis*,1962,1963</query_string>
  </article>

  <article>
    <bibitem>11</bibitem>
    <author>Kiguradze, I. T.</author>
    <title>A note on the oscillation of solutions of the equation</title>
    <journal>Casopis Pestovani Matematiky</journal>
    <vol>92</vol>
    <year>1967</year>
    <page>343-350</page>
    <mr>MR0221012</mr>
    <score>71</score>
    <query_string>Cache/Ki/Kiguradze,oscillation,Casopis*,1967,1968</query_string>
  </article>

  <other>
    <bibitem>12</bibitem>
    <raw_data>Nehari, Z., A non-linear oscillation problem, J. Diff. Equations, 5 (1969), (to appear)</raw_data>
    <mr>MR0235203</mr>
  </other>

</references>
</top_article>
