%0 Journal Article %A E.G. Tretjakova %T Commutative semigroups which are embeddable into epigroups. %J Semigroup forum %D 1993 %P 78-84 %V 46 %N 1 %I mathdoc %U http://geodesic.mathdoc.fr/item/SF_1993__46_1_135213/ %F SF_1993__46_1_135213