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@article{DE_1982_18_5_a25, author = {O. A. Ivanov}, title = {Existence of periodic solutions of quasihomogeneous systems}, journal = {Differencialʹnye uravneni\^a}, pages = {898--901}, publisher = {mathdoc}, volume = {18}, number = {5}, year = {1982}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/DE_1982_18_5_a25/} }
O. A. Ivanov. Existence of periodic solutions of quasihomogeneous systems. Differencialʹnye uravneniâ, Tome 18 (1982) no. 5, pp. 898-901. http://geodesic.mathdoc.fr/item/DE_1982_18_5_a25/