@article{DE_1976_12_4_a17,
     author = {V. Ya. Derr},
     title = {A criterion for the nonoscillation of a linear difference equation},
     journal = {Differencialʹnye uravneni\^a},
     pages = {747--750},
     publisher = {mathdoc},
     volume = {12},
     number = {4},
     year = {1976},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DE_1976_12_4_a17/}
}