TY - JOUR AU - Z. Liu TI - Characterization of monoids by condition (P) of cyclic left acts. JO - Semigroup forum PY - 1994 SP - 31 EP - 40 VL - 49 IS - 2 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/SF_1994__49_2_135331/ ID - SF_1994__49_2_135331 ER -