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@article{DE_1969_5_11_a7, author = {M. V. Dolov}, title = {Limit {Cycles} and analytic integrals}, journal = {Differencialʹnye uravneni\^a}, pages = {2026--2033}, publisher = {mathdoc}, volume = {5}, number = {11}, year = {1969}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/DE_1969_5_11_a7/} }
M. V. Dolov. Limit Cycles and analytic integrals. Differencialʹnye uravneniâ, Tome 5 (1969) no. 11, pp. 2026-2033. http://geodesic.mathdoc.fr/item/DE_1969_5_11_a7/