@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/}
}