TY - JOUR AU - E.G. Tretjakova TI - Commutative semigroups which are embeddable into epigroups. JO - Semigroup forum PY - 1993 SP - 78 EP - 84 VL - 46 IS - 1 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/SF_1993__46_1_135213/ ID - SF_1993__46_1_135213 ER -