@article{EJDE_2013__2013__a178,
     author = {Liu,  Yong and Qi,  Xiaoguang and Yi,  Hongxun},
     title = {Value distribution of difference polynomials of meromorphic functions},
     journal = {Electronic journal of differential equations},
     year = {2013},
     volume = {2013},
     zbl = {1291.30211},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/EJDE_2013__2013__a178/}
}