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@article{DE_1965_1_4_a4, author = {V. P. Zakharov}, title = {Limiting cycles of infinite multiplicity}, journal = {Differencialʹnye uravneni\^a}, pages = {464--466}, publisher = {mathdoc}, volume = {1}, number = {4}, year = {1965}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/DE_1965_1_4_a4/} }
V. P. Zakharov. Limiting cycles of infinite multiplicity. Differencialʹnye uravneniâ, Tome 1 (1965) no. 4, pp. 464-466. http://geodesic.mathdoc.fr/item/DE_1965_1_4_a4/