%0 Journal Article
%A Jiang, Daqing
%A Wei, Junjie
%A Zhang, Bo
%T Positive periodic solutions of functional differential equations and population models
%J Electronic Journal of Differential Equations
%D 2002
%V 2002
%I mathdoc
%U http://geodesic.mathdoc.fr/item/EJDE_2002__2002__a116/
%G en
%F EJDE_2002__2002__a116