%0 Journal Article %A J.D. jr. Magill %T Semigroups in which ... and ... coincide for regular elements. %J Semigroup forum %D 1982 %P 383-385 %V 25 %I mathdoc %U http://geodesic.mathdoc.fr/item/SF_1982__25_134588/ %F SF_1982__25_134588