TY  - JOUR
AU  - Schwarz, Štefan
TI  - A theorem on normal semigroups
JO  - Czechoslovak Mathematical Journal
PY  - 1960
SP  - 197
EP  - 200
VL  - 10
IS  - 2
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/articles/10.21136/CMJ.1960.100403/
DO  - 10.21136/CMJ.1960.100403
LA  - en
ID  - 10_21136_CMJ_1960_100403
ER  -