TY - JOUR AU - I. B. Simonenko TI - Higher approximations of the averaging method for abstract parabolic equations JO - Sbornik. Mathematics PY - 1973 SP - 535 EP - 543 VL - 21 IS - 4 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/SM_1973_21_4_a3/ LA - en ID - SM_1973_21_4_a3 ER -