TY - JOUR AU - U. Asibong-Ibe TI - *-Simple type A ...-semigroups. JO - Semigroup forum PY - 1993 SP - 135 EP - 149 VL - 47 IS - 2 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/SF_1993__47_2_135265/ ID - SF_1993__47_2_135265 ER -