@article{DE_1982_18_6_a17,
     author = {A. A. Aizikovich},
     title = {A non-oscillation criterion for a system of difference equations},
     journal = {Differencialʹnye uravneni\^a},
     pages = {1072--1073},
     year = {1982},
     volume = {18},
     number = {6},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DE_1982_18_6_a17/}
}