%0 Journal Article
%A Alwash,  Mohamad Ali M.
%T Complex centers of polynomial differential equations
%J Electronic journal of differential equations
%D 2007
%V 2007
%U http://geodesic.mathdoc.fr/item/EJDE_2007__2007__a233/
%G en
%F EJDE_2007__2007__a233