@article{EJDE_2011__2011__a2,
     author = {Qi,  Jianming and Ding,  Jie and Zhu,  Taiying},
     title = {Entire solutions for a nonlinear differential equation},
     journal = {Electronic journal of differential equations},
     year = {2011},
     volume = {2011},
     zbl = {1226.30034},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/EJDE_2011__2011__a2/}
}