MR1815471
Zhang, Zhengqiu and Wang, Zhicheng and Yu, Jianshe
Zhengqiu ZHANG, Zhicheng WANG and Jianshe YU
On the existence of periodic solutions of third order functional differential equations
Funkcialaj Ekvacioj. Serio Internacia
43
2000
461--469
http://fe.math.kobe-u.ac.jp/FE/FullPapers/vol43/fe43-3-4.pdf
http://fe.math.kobe-u.ac.jp/FE/no-infty-pdf.pdf
http://www.ams.org/mathscinet-getitem?mr=MR1815471
43-461
2000
On the Existence of Periodic Solutions of Third Order Functional Differential Equations
Zhengqiu ZHANG, Zhicheng WANG and Jianshe YU
Zhengqiu ZHANG, Zhicheng WANG and Jianshe YU
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