%0 Journal Article
%A E.A. Behrens
%T Semigroups with a noncommutative arithmetic.
%J Semigroup forum
%D 1981
%P 95-118
%V 23
%I mathdoc
%U http://geodesic.mathdoc.fr/item/SF_1981__23_134508/
%F SF_1981__23_134508