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@article{DE_1967_3_4_a10, author = {M. G. Khudai-Verenov}, title = {A remark on limit cycles of an equation}, journal = {Differencialʹnye uravneni\^a}, pages = {692--694}, publisher = {mathdoc}, volume = {3}, number = {4}, year = {1967}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/DE_1967_3_4_a10/} }
M. G. Khudai-Verenov. A remark on limit cycles of an equation. Differencialʹnye uravneniâ, Tome 3 (1967) no. 4, pp. 692-694. http://geodesic.mathdoc.fr/item/DE_1967_3_4_a10/