@article{DE_1973_9_3_a26,
     author = {I. V. Kamenev},
     title = {A certain specific nonlinear oscillation theorem},
     journal = {Differencialʹnye uravneni\^a},
     pages = {574--576},
     publisher = {mathdoc},
     volume = {9},
     number = {3},
     year = {1973},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DE_1973_9_3_a26/}
}