%0 Journal Article
%A Fei,  Guihua
%T On periodic solutions of superquadratic Hamiltonian systems
%J Electronic journal of differential equations
%D 2002
%V 2002
%U http://geodesic.mathdoc.fr/item/EJDE_2002__2002__a190/
%G en
%F EJDE_2002__2002__a190