%0 Journal Article
%A Olaf Tamaschke
%T An Extension of Group Theory to S-semigroups.
%J Mathematische Zeitschrift
%D 1968
%P 74-90
%V 104
%I mathdoc
%U http://geodesic.mathdoc.fr/item/MZ_1968__104_170931/
%F MZ_1968__104_170931