%0 Journal Article
%A Li, Zhixiang
%A Wang, Xiao
%T Existence of positive periodic solutions for neutral functional differential equations
%J Electronic Journal of Differential Equations
%D 2006
%V 2006
%I mathdoc
%U http://geodesic.mathdoc.fr/item/EJDE_2006__2006__a94/
%G en
%F EJDE_2006__2006__a94