%0 Journal Article %A Li, Chun %A Ou, Zeng-Qi %A Tang, Chun-Lei %T Existence of nontrivial solutions for a class of elliptic systems %J Electronic journal of differential equations %D 2013 %V 2013 %U http://geodesic.mathdoc.fr/item/EJDE_2013__2013__a144/ %G en %F EJDE_2013__2013__a144