@article{DE_1973_9_3_a28,
     author = {J. D. Mirzov},
     title = {The oscillatoriness of the solutions of a system of nonlinear differential equations},
     journal = {Differencialʹnye uravneni\^a},
     pages = {581--583},
     publisher = {mathdoc},
     volume = {9},
     number = {3},
     year = {1973},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DE_1973_9_3_a28/}
}