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<top_article>
 <mrnumber>MR0597419</mrnumber>
 <author>Kusano, Taka{\^s}i and Yoshida, Norio</author>
 <author_utf8>Taka&#349;i KUSANO and Norio YOSHIDA</author_utf8>
 <title>Nonlinear oscillation criteria for singular elliptic               differential operators</title>
 <journal>Fako de l'Funkcialaj Ekvacioj Japana Matematika Societo.               Funkcialaj Ekvaciog. Serio Internacia</journal>
 <volume>23</volume>
 <year>1980</year>
 <page>135--142</page>
 <url_pdf>http://fe.math.kobe-u.ac.jp/FE/Free/vol23/fe23-2-2.pdf</url_pdf>
 <url_infty_pdf>http://fe.math.kobe-u.ac.jp/FE/FE_pdf_with_bookmark/FE21-30-en_KML/fe23-135-142/fe23-135-142.pdf</url_infty_pdf>
 <mathsci_link> http://www.ams.org/mathscinet-getitem?mr=MR0597419</mathsci_link>

<fesi_info>
  <FILE>fe23-135-142</FILE>
  <YEAR>1980</YEAR>
  <TITLE>Nonlinear Oscillation Criteria for Singular Elliptic Differential Operators</TITLE>
  <AUTHOR>Kusano, Taka{\^s}i and Yoshida, Norio</AUTHOR>
  <AUTHOR_utf8>Kusano, Taka{\^s}i and Yoshida, Norio</AUTHOR_utf8>
</fesi_info>

<references>

<article>
<bibitem>1</bibitem>
<author>Allegretto, W.</author>
<title>Oscillation criteria for quasilinear equations</title>
<journal>Canad. J. Math.</journal>
<vol>26</vol>
<year>1974</year>
<page>931-947</page>
<mr>MR0344642</mr>
</article>

<article>
<bibitem>2</bibitem>
<author>Allegretto, W.</author>
<title>Oscillation criteria for semilinear equations in general domains</title>
<journal>Canad. Math. Bull.</journal>
<vol>19</vol>
<year>1976</year>
<page>137-144</page>
<mr>MR0430482</mr>
</article>

<article>
<bibitem>3</bibitem>
<author>Dunninger, D. R.; Weinacht, R. J.</author>
<title>Separation and comparison theorems for classes of singular elliptic inequalities and degenerate elliptic inequalities</title>
<journal>Applicable Anal.</journal>
<vol>1</vol>
<year>1971</year>
<page>43-55</page>
<mr>MR0289922</mr>
</article>

<article>
<bibitem>4</bibitem>
<author>Kitamura, Y.; Kusano, T.</author>
<title>An oscillation theorem for a sublinear Schr&#246;dinger equation</title>
<journal>Utilitas Math.</journal>
<vol>14</vol>
<year>1978</year>
<page>171-175</page>
<mr>MR0511522</mr>
</article>

<article>
<bibitem>5</bibitem>
<author>Kitamura, Y.; Kusano, T.</author>
<title>Nonlinear oscillation of a fourth order elliptic equation</title>
<journal>J. Differential Equations</journal>
<vol>30</vol>
<year>1978</year>
<page>280-286</page>
<mr>MR0513273</mr>
</article>

<article>
<bibitem>6</bibitem>
<author>Natio, M.; Yoshida, N.</author>
<title>Oscillation theorems for semilinear elliptic differential operators</title>
<journal>Proc. Roy. Soc. Edinburgh Sect. A</journal>
<vol>82</vol>
<year>1978/1979</year>
<page>135-151</page>
<mr>MR0524680</mr>
</article>

<article>
<bibitem>7</bibitem>
<author>Noussair, E. S.; Swanson, C. A.</author>
<title>Oscillation theory for semilinear Schr&#246;dinger equations and inequalities</title>
<journal>Proc. Roy. Soc. Edinburgh Sect. A</journal>
<vol>75</vol>
<year>1975/1976</year>
<page>67-81</page>
<mr>MR0442436</mr>
</article>

<article>
<bibitem>8</bibitem>
<author>Noussair, E. S.; Swanson, C. A.</author>
<title>Oscillation of nonlinear vector differential equations</title>
<journal>Ann. Mat. Pura Appl.</journal>
<vol>109</vol>
<year>1976</year>
<page>305-315</page>
<mr>MR0425321</mr>
</article>

<article>
<bibitem>9</bibitem>
<author>Swanson, C. A.</author>
<title>A comparison theorem for eigenfunctions</title>
<journal>Proc. Amer. Math. Soc.</journal>
<vol>37</vol>
<year>1973</year>
<page>537-540</page>
<mr>MR0312041</mr>
</article>


</references>
</top_article>
