%0 Journal Article %A R. Thron %A D. Kittler %T On semigroups with least generating sets. %J Semigroup forum %D 1987 %P 341-350 %V 36 %I mathdoc %U http://geodesic.mathdoc.fr/item/SF_1987__36_134906/ %F SF_1987__36_134906