%0 Journal Article
%A Chicone,  Carmen
%A Felts,  Kenny
%T Non-monotone period functions for impact oscillators
%J Electronic journal of differential equations
%D 2008
%V 2008
%U http://geodesic.mathdoc.fr/item/EJDE_2008__2008__a6/
%G en
%F EJDE_2008__2008__a6