%0 Journal Article
%A Ren,  Jingli
%A Siegmund,  Stefan
%A Chen,  Yueli
%T Positive periodic solutions for third-order nonlinear differential equations
%J Electronic journal of differential equations
%D 2011
%V 2011
%U http://geodesic.mathdoc.fr/item/EJDE_2011__2011__a87/
%G en
%F EJDE_2011__2011__a87