TY - JOUR AU - S. P. Tokarev TI - The averaging method and the local equivalence of analytic systems with a small parameter JO - Differencialʹnye uravneniâ PY - 1987 SP - 999 EP - 1009 VL - 23 IS - 6 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/DE_1987_23_6_a8/ LA - ru ID - DE_1987_23_6_a8 ER -