<?xml version="1.0" encoding="UTF-8"?>
<?xml-stylesheet type="text/xsl" href="f3.xsl"?>
<top_article>
 <mrnumber>MR1815471</mrnumber>
 <author>Zhang, Zhengqiu and Wang, Zhicheng and Yu, Jianshe</author>
 <author_utf8>Zhengqiu ZHANG, Zhicheng WANG and Jianshe YU</author_utf8>
 <title>On the existence of periodic solutions of third order               functional differential equations</title>
 <journal>Funkcialaj Ekvacioj. Serio Internacia</journal>
 <volume>43</volume>
 <year>2000</year>
 <page>461--469</page>
 <url_pdf>http://fe.math.kobe-u.ac.jp/FE/FullPapers/vol43/fe43-3-4.pdf</url_pdf>
 <url_infty_pdf>http://fe.math.kobe-u.ac.jp/FE/no-infty-pdf.pdf</url_infty_pdf>
 <mathsci_link> http://www.ams.org/mathscinet-getitem?mr=MR1815471</mathsci_link>
<fesi_info>
  <FILE>43-461</FILE>
  <YEAR>2000</YEAR>
  <TITLE>On the Existence of Periodic Solutions of Third Order Functional Differential Equations</TITLE>
  <AUTHOR>Zhengqiu ZHANG, Zhicheng WANG and Jianshe YU</AUTHOR>
  <AUTHOR_utf8>Zhengqiu ZHANG, Zhicheng WANG and Jianshe YU</AUTHOR_utf8>
</fesi_info>

<references>

<article>
<bibitem>1</bibitem>
<author>Ding, W. Y.</author>
<title>Fixed points of twist mappings and periodic solutions of ordinary differential equations</title>
<journal>Acta. Math. Sinica</journal>
<vol>25</vol>
<year>1981</year>
<page>227-235</page>
<mr>MR0677834</mr>
</article>

<article>
<bibitem>2</bibitem>
<author>Leach, D. E.</author>
<title>On Poincar&#233;'s perturbation theorem and a theorem of W. S. Loud</title>
<journal>J. Differential Equations</journal>
<vol>7</vol>
<year>1970</year>
<page>34-53</page>
<mr>MR0251308</mr>
</article>

<article>
<bibitem>3</bibitem>
<author>Reissig, R.</author>
<title>Contractive mappings and periodically perturbed, non-conservative systems</title>
<journal>Atti Accad Naz. Lincei Rend. Cl. Sci. Fis. Mat. Natur.</journal>
<vol>58</vol>
<year>1975</year>
<page>696-702</page>
<mr>MR0430423</mr>
</article>

<article>
<bibitem>4</bibitem>
<author>Andres, J.</author>
<title>Periodic boundary value problem for certain nonlinear differential equations of the third order</title>
<journal>Math. Slovaca</journal>
<vol>35</vol>
<year>1985</year>
<page>305-309</page>
<mr>MR0808366</mr>
</article>

<article>
<bibitem>5</bibitem>
<author>Ezeilo, J. O. C.</author>
<title>On the existence of periodic solutions of a certain third-order differential equation</title>
<journal>Proc. Cambridge Philos. Soc.</journal>
<vol>56</vol>
<year>1960</year>
<page>381-389</page>
<mr>MR0121539</mr>
</article>

<article>
<bibitem>6</bibitem>
<author>Ezeilo, J. O. C.</author>
<title>Periodic solutions of third-order differential equations in the past twenty five years or so</title>
<journal>invited paper presented at the "2nd Pan-African Congress of the African Mathematical Union, March 1986, University of Jos, Nigeria"</journal>
<year>1986</year>
<page>23-29</page>
</article>

<article>
<bibitem>7</bibitem>
<author>Afuwape, A. U.; Omari, P.; Zanolin, F.</author>
<title>Nonlinear perturbation of differential operators with nontrivial kernel and applications to third-order periodic boundary value problems</title>
<journal>J. Math. Anal. Appl.</journal>
<vol>143</vol>
<year>1989</year>
<page>35-36</page>
<mr>MR1019448</mr>
</article>

<article>
<bibitem>8</bibitem>
<author>Sedziwy, S.</author>
<title>On periodic solutions of a certain third-order nonlinear differential equation</title>
<journal>Ann. Polon. Math.</journal>
<vol>17</vol>
<year>1965</year>
<page>147-154</page>
<mr>MR0185208</mr>
</article>

<article>
<bibitem>9</bibitem>
<author>Lazer, A. C.; Leach, D. E.</author>
<title>Bounded perturbations of forced harmonic oscillations at resonance</title>
<journal>Ann. Mat. Pura. Appl.</journal>
<vol>82</vol>
<year>1969</year>
<page>49-68</page>
<mr>MR0249731</mr>
</article>

<article>
<bibitem>10</bibitem>
<author>C&#233;sari, L.</author>
<title>Nonlinear problems across a point of resonance for non-self-adjoint system</title>
<journal>Nonlinear Analysis (A Collection of papers in honor of Brich H. Rothe), edited by L. Cesari et al., Academic Press, New York</journal>
<year>1978</year>
<page>43-67</page>
<mr>MR0499091</mr>
</article>

<article>
<bibitem>11</bibitem>
<author>Layton, W.</author>
<title>Periodic solutions of nonlinear delay equations</title>
<journal>J. Math. Anal. Appl.</journal>
<vol>77</vol>
<year>1980</year>
<page>198-204</page>
<mr>MR0591270</mr>
</article>

<article>
<bibitem>12</bibitem>
<author>Iannacci, R.; Nkashama, M. N.</author>
<title>On periodic solutions of Forced second order differential equations with a deviating argument</title>
<journal>Lecture Notes in Math., 1151, Springer-Verlag, Berlin</journal>
<year>1984</year>
<page>224-232</page>
<mr>MR0826292</mr>
</article>

<article>
<bibitem>13</bibitem>
<author>Mawhin, J.; Ward, Jr., J. R.</author>
<title>Nonuniform nonresonance conditions at the two first eigenvalues for periodic solutions of forced Lienard and Duffing equations</title>
<journal>Rocky Mountain J. Math.</journal>
<vol>12</vol>
<year>1982</year>
<page>643-654</page>
<mr>MR0683859</mr>
</article>

<article>
<bibitem>14</bibitem>
<author>Huang, X. K.</author>
<title>$2\pi$-periodic solutions of conservative systems with a deviating argument</title>
<journal>J. Systems. Sci. Math. Sci.</journal>
<vol>9</vol>
<year>1989</year>
<page>298-308 (Chinese)</page>
<mr>MR1023748</mr>
</article>

<article>
<bibitem>15</bibitem>
<author>Huang, X. K.; Xiang, Z. G.</author>
<title>$2\pi$-periodic solutions of Duffing equations with a deviating argument</title>
<journal>Chinese Sci. Bull.</journal>
<vol>39</vol>
<year>1994</year>
<page>201-203 (Chinese)</page>
</article>

<book>
<bibitem>16</bibitem>
<author>Gaines, R. B.; Mawhin, J.</author>
<booktitle>Coincidence Degree and Nonlinear Differential Equations</booktitle>
<publisher>Lecture Notes in Math., 568, Springer-Verlag, Berlin</publisher>
<year>1977</year>
<mr>MR0637067</mr>
</book>

<book>
<bibitem>17</bibitem>
<author>Mawhin, J.</author>
<booktitle>Topological Degree Methods in Nonlinear Boundary Value Problems</booktitle>
<publisher>CBMS. Vol. 40, Amer. Math. Soc., Providence, RI</publisher>
<year>1979</year>
<mr>MR0525202</mr>
</book>

<article>
<bibitem>18</bibitem>
<author>Mawhin, J.</author>
<title>Equivalence theorems for nonlinear pperator equations and coincidence degree theory for some mappings in locally convex topological vector spaces</title>
<journal>J. Differential Equations</journal>
<vol>12</vol>
<year>1972</year>
<page>610-636</page>
<mr>MR0328703</mr>
</article>

<book>
<bibitem>19</bibitem>
<author>Deimling, K.</author>
<booktitle>Nonlinear Functional Analysis</booktitle>
<publisher>Spring-Verlag, New York</publisher>
<year>1985</year>
<mr>MR0787404</mr>
</book>

<book>
<bibitem>20</bibitem>
<author>Hale, J. K.</author>
<booktitle>Ordinary Differential Equations</booktitle>
<publisher>Wiley-Interscience, New York</publisher>
<year>1969</year>
<mr>MR0419901</mr>
</book>

</references>
</top_article>
