TY - JOUR AU - G. E. Popov TI - Some integrable equations with a small parameter that are close to Li\'enard's equation JO - Differencialʹnye uravneniâ PY - 1984 SP - 274 EP - 278 VL - 20 IS - 2 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/DE_1984_20_2_a10/ LA - ru ID - DE_1984_20_2_a10 ER -