%0 Journal Article
%A W. Williams
%A C. Eberhart
%T Elementary semigroups.
%J Semigroup forum
%D 1977
%P 295-310
%V 15
%I mathdoc
%U http://geodesic.mathdoc.fr/item/SF_1977__15_134261/
%F SF_1977__15_134261