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@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/} }
I. V. Kamenev. A certain specific nonlinear oscillation theorem. Differencialʹnye uravneniâ, Tome 9 (1973) no. 3, pp. 574-576. http://geodesic.mathdoc.fr/item/DE_1973_9_3_a26/