TY - JOUR AU - R. B. Feizullaev TI - Semigroups of transformations of fixed rank JO - Doklady Akademii Nauk PY - 1988 SP - 829 EP - 831 VL - 299 IS - 4 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/DAN_1988_299_4_a13/ LA - ru ID - DAN_1988_299_4_a13 ER -