TY - JOUR AU - A. L. Štaras TI - The averaging method for weakly nonlinear operator equations JO - Sbornik. Mathematics PY - 1989 SP - 223 EP - 242 VL - 62 IS - 1 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/SM_1989_62_1_a14/ LA - en ID - SM_1989_62_1_a14 ER -