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@article{DE_1975_11_11_a2, author = {M. V. Dolov}, title = {Limit cycles and algebraic integrals in the case of a center}, journal = {Differencialʹnye uravneni\^a}, pages = {1935--1941}, publisher = {mathdoc}, volume = {11}, number = {11}, year = {1975}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/DE_1975_11_11_a2/} }
M. V. Dolov. Limit cycles and algebraic integrals in the case of a center. Differencialʹnye uravneniâ, Tome 11 (1975) no. 11, pp. 1935-1941. http://geodesic.mathdoc.fr/item/DE_1975_11_11_a2/