%0 Journal Article
%A Zhao,  Kaihong
%A Li,  Yongkun
%T Multiple positive periodic solutions to a non-autonomous Lotka-Volterra predator-prey system with harvesting terms
%J Electronic journal of differential equations
%D 2011
%V 2011
%U http://geodesic.mathdoc.fr/item/EJDE_2011__2011__a66/
%G en
%F EJDE_2011__2011__a66