%0 Journal Article
%A B.M. Schein
%T On two papers of B.M. Schein.
%J Semigroup forum
%D 1981
%P 87-88
%V 23
%I mathdoc
%U http://geodesic.mathdoc.fr/item/SF_1981__23_134506/
%F SF_1981__23_134506