@article{CMJ_2000__50_2_a9,
     author = {Grace, S. R.},
     title = {Oscillation of certain difference equations},
     journal = {Czechoslovak Mathematical Journal},
     pages = {347--358},
     publisher = {mathdoc},
     volume = {50},
     number = {2},
     year = {2000},
     mrnumber = {1761392},
     zbl = {1051.39005},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/CMJ_2000__50_2_a9/}
}