TY - JOUR AU - V. V. Laricheva TI - On the averaging of a certain class of systems of nonlinear differential equations JO - Differencialʹnye uravneniâ PY - 1966 SP - 345 EP - 352 VL - 2 IS - 3 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/DE_1966_2_3_a5/ LA - ru ID - DE_1966_2_3_a5 ER -