@article{10_1007_s10587_011_0008_z,
     author = {Chen, Zong-Xuan and Shon, Kwang Ho},
     title = {Properties of differences of meromorphic functions},
     journal = {Czechoslovak Mathematical Journal},
     pages = {213--224},
     publisher = {mathdoc},
     volume = {61},
     number = {1},
     year = {2011},
     doi = {10.1007/s10587-011-0008-z},
     mrnumber = {2782770},
     zbl = {1224.30156},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.1007/s10587-011-0008-z/}
}