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@article{DE_1995_31_6_a24, author = {R. M. Teshev and D. S. Ushkho}, title = {On limit cycles and separatrices of a quadratic system}, journal = {Differencialʹnye uravneni\^a}, pages = {1096--1097}, publisher = {mathdoc}, volume = {31}, number = {6}, year = {1995}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/DE_1995_31_6_a24/} }
R. M. Teshev; D. S. Ushkho. On limit cycles and separatrices of a quadratic system. Differencialʹnye uravneniâ, Tome 31 (1995) no. 6, pp. 1096-1097. http://geodesic.mathdoc.fr/item/DE_1995_31_6_a24/