%0 Journal Article
%A Girg,  Petr
%T Existence of periodic solutions for a semilinear ordinary differential equation
%J Electronic journal of differential equations
%D 1998
%V 1998
%U http://geodesic.mathdoc.fr/item/EJDE_1998__1998__a28/
%G en
%F EJDE_1998__1998__a28