@article{EJDE_2015__2015__a91,
     author = {Shi,  Haiping and Liu,  Xia and Zhang,  Yuanbiao},
     title = {Homoclinic orbits of second-order nonlinear difference equations},
     journal = {Electronic journal of differential equations},
     year = {2015},
     volume = {2015},
     zbl = {1330.39016},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/EJDE_2015__2015__a91/}
}