%0 Journal Article %A K.D. jr. Magill %T Semigroups with only finitely many regular ... -classes. %J Semigroup forum %D 1982 %P 361-378 %V 25 %I mathdoc %U http://geodesic.mathdoc.fr/item/SF_1982__25_134585/ %F SF_1982__25_134585