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@article{DE_1984_20_2_a10, author = {G. E. Popov}, title = {Some integrable equations with a small parameter that are close to {Li\'enard's} equation}, journal = {Differencialʹnye uravneni\^a}, pages = {274--278}, publisher = {mathdoc}, volume = {20}, number = {2}, year = {1984}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/DE_1984_20_2_a10/} }
G. E. Popov. Some integrable equations with a small parameter that are close to Li\'enard's equation. Differencialʹnye uravneniâ, Tome 20 (1984) no. 2, pp. 274-278. http://geodesic.mathdoc.fr/item/DE_1984_20_2_a10/