%0 Journal Article
%A A.H. Clifford
%T A proof of the Montague-Plemmons-Schein Theorem on maximal subgroups of the semigroup of binary relations.
%J Semigroup forum
%D 1970
%P 272-275
%V 1
%I mathdoc
%U http://geodesic.mathdoc.fr/item/SF_1970__1_133801/
%F SF_1970__1_133801