@article{10_21136_MB_2000_126277,
     author = {Grace, S. R. and El-Morshedy, H. A.},
     title = {On the oscillation of certain difference equations},
     journal = {Mathematica Bohemica},
     pages = {421--430},
     publisher = {mathdoc},
     volume = {125},
     number = {4},
     year = {2000},
     doi = {10.21136/MB.2000.126277},
     mrnumber = {1802291},
     zbl = {0969.39005},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.21136/MB.2000.126277/}
}