TY  - JOUR
AU  - Olaf Tamaschke
TI  - An Extension of Group Theory to S-semigroups.
JO  - Mathematische Zeitschrift
PY  - 1968
SP  - 74
EP  - 90
VL  - 104
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/MZ_1968__104_170931/
ID  - MZ_1968__104_170931
ER  -