%0 Journal Article
%A Li, Yongjin
%T Existence of periodic solutions for second-order neutral differential equations
%J Electronic Journal of Differential Equations
%D 2005
%V 2005
%I mathdoc
%U http://geodesic.mathdoc.fr/item/EJDE_2005__2005__a75/
%G en
%F EJDE_2005__2005__a75