@article{EJDE_2016__2016__a20,
     author = {Wang, Tao},
     title = {Existence and nonexistence of nontrivial solutions for {Choquard} type equations},
     journal = {Electronic Journal of Differential Equations},
     publisher = {mathdoc},
     volume = {2016},
     year = {2016},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/EJDE_2016__2016__a20/}
}