%0 Journal Article
%A J.A. Gerhard
%T Semigroups with idempotent powers, I.
%J Semigroup forum
%D 1977
%P 137-142
%V 14
%I mathdoc
%U http://geodesic.mathdoc.fr/item/SF_1977__14_186362/
%F SF_1977__14_186362