TY  - JOUR
AU  - Schwarz, Štefan
TI  - On semigroups having a kernel
JO  - Czechoslovak Mathematical Journal
PY  - 1951
SP  - 229
EP  - 264
VL  - 1
IS  - 4
UR  - http://geodesic.mathdoc.fr/articles/10.21136/CMJ.1951.100031/
DO  - 10.21136/CMJ.1951.100031
LA  - en
ID  - 10_21136_CMJ_1951_100031
ER  -