%0 Journal Article
%A W. Barit
%T Automorphism invariants for semigroups.
%J Semigroup forum
%D 1986
%P 219-238
%V 33
%I mathdoc
%U http://geodesic.mathdoc.fr/item/SF_1986__33_134805/
%F SF_1986__33_134805