TY - JOUR AU - M. Satyanarayana TI - On semigroups admitting ring structure. JO - Semigroup forum PY - 1971 SP - 43 EP - 50 VL - 3 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/SF_1971__3_133842/ ID - SF_1971__3_133842 ER -