TY  - JOUR
AU  - Pondělíček, Bedřich
TI  - On weakly commutative semigroups
JO  - Czechoslovak Mathematical Journal
PY  - 1975
SP  - 20
EP  - 23
VL  - 25
IS  - 1
UR  - http://geodesic.mathdoc.fr/articles/10.21136/CMJ.1975.101289/
DO  - 10.21136/CMJ.1975.101289
LA  - en
ID  - 10_21136_CMJ_1975_101289
ER  -