@article{EJDE_2013__2013__a144,
     author = {Li,  Chun and Ou,  Zeng-Qi and Tang,  Chun-Lei},
     title = {Existence of nontrivial solutions for a class of elliptic systems},
     journal = {Electronic journal of differential equations},
     year = {2013},
     volume = {2013},
     zbl = {1291.35059},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/EJDE_2013__2013__a144/}
}