TY - JOUR AU - I. M. Krichever TI - Method of averaging for two-dimensional ``integrable'' equations JO - Funkcionalʹnyj analiz i ego priloženiâ PY - 1988 SP - 37 EP - 52 VL - 22 IS - 3 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/FAA_1988_22_3_a3/ LA - ru ID - FAA_1988_22_3_a3 ER -