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@article{DE_1991_27_11_a14, author = {V. V. Amel'kin}, title = {On some properties of divergent limit cycles}, journal = {Differencialʹnye uravneni\^a}, pages = {1975--1976}, publisher = {mathdoc}, volume = {27}, number = {11}, year = {1991}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/DE_1991_27_11_a14/} }
V. V. Amel'kin. On some properties of divergent limit cycles. Differencialʹnye uravneniâ, Tome 27 (1991) no. 11, pp. 1975-1976. http://geodesic.mathdoc.fr/item/DE_1991_27_11_a14/