TY - JOUR AU - M. V. Dolov AU - R. V. Kuz'min TI - On the limit cycles of a class of systems JO - Differencialʹnye uravneniâ PY - 1993 SP - 1481 EP - 1485 VL - 29 IS - 9 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/DE_1993_29_9_a1/ LA - ru ID - DE_1993_29_9_a1 ER -