%0 Journal Article
%A J.B. Kirn
%T No semigroup is a finite union of mutants.
%J Semigroup forum
%D 1974
%P 360-361
%V 6
%I mathdoc
%U http://geodesic.mathdoc.fr/item/SF_1974__6_133995/
%G en
%F SF_1974__6_133995