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@article{DE_1970_6_5_a0, author = {I. S. Kukles and I. G. Rozet}, title = {A certain case of generation of limit cycles on a plane}, journal = {Differencialʹnye uravneni\^a}, pages = {771--778}, publisher = {mathdoc}, volume = {6}, number = {5}, year = {1970}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/DE_1970_6_5_a0/} }
I. S. Kukles; I. G. Rozet. A certain case of generation of limit cycles on a plane. Differencialʹnye uravneniâ, Tome 6 (1970) no. 5, pp. 771-778. http://geodesic.mathdoc.fr/item/DE_1970_6_5_a0/