%0 Journal Article
%A Fan, Xuanlong
%A Li, Yongkun
%T Positive periodic solutions of neutral functional differential equations with a parameter and impulse
%J Electronic Journal of Differential Equations
%D 2008
%V 2008
%I mathdoc
%U http://geodesic.mathdoc.fr/item/EJDE_2008__2008__a57/
%G en
%F EJDE_2008__2008__a57