@article{ZAA_1999__18_1_48263,
     author = {Tian, C.J. and Zhang, B.G.},
     title = {Frequent oscillation of a class of partial difference equations.},
     journal = {Zeitschrift f\"ur Analysis und ihre Anwendungen},
     pages = {111--130},
     publisher = {mathdoc},
     volume = {18},
     number = {1},
     year = {1999},
     zbl = {0923.39009},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/ZAA_1999__18_1_48263/}
}