@article{10_4064_cm_65_1_25_32,
     author = {B. Lalli and B. Zhang},
     title = {Oscillation of difference equations},
     journal = {Colloquium Mathematicum},
     pages = {25--32},
     publisher = {mathdoc},
     volume = {65},
     number = {1},
     year = {1993},
     doi = {10.4064/cm-65-1-25-32},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.4064/cm-65-1-25-32/}
}