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@article{DE_1984_20_3_a5, author = {Yu. V. Malyshev and V. P. Zakharov}, title = {Annular domains that contain limit cycles}, journal = {Differencialʹnye uravneni\^a}, pages = {408--413}, publisher = {mathdoc}, volume = {20}, number = {3}, year = {1984}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/DE_1984_20_3_a5/} }
Yu. V. Malyshev; V. P. Zakharov. Annular domains that contain limit cycles. Differencialʹnye uravneniâ, Tome 20 (1984) no. 3, pp. 408-413. http://geodesic.mathdoc.fr/item/DE_1984_20_3_a5/