%0 Journal Article %A A. Varisco %A A. Cherubini %T On the exponent semigroup of an E-m semigroup. %J Semigroup forum %D 1981 %P 359-370 %V 23 %I mathdoc %U http://geodesic.mathdoc.fr/item/SF_1981__23_134528/ %F SF_1981__23_134528