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@article{DE_1996_32_6_a9, author = {V. G. Romanovsky}, title = {On the cyclicity of a singular point of a cubic system}, journal = {Differencialʹnye uravneni\^a}, pages = {784--787}, publisher = {mathdoc}, volume = {32}, number = {6}, year = {1996}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/DE_1996_32_6_a9/} }
V. G. Romanovsky. On the cyclicity of a singular point of a cubic system. Differencialʹnye uravneniâ, Tome 32 (1996) no. 6, pp. 784-787. http://geodesic.mathdoc.fr/item/DE_1996_32_6_a9/