TY - JOUR AU - V. V. Amel'kin AU - A. B. Levin TI - A criterion for the stability of multiple limit cycles JO - Differencialʹnye uravneniâ PY - 1999 SP - 3 EP - 7 VL - 35 IS - 1 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/DE_1999_35_1_a0/ LA - ru ID - DE_1999_35_1_a0 ER -