TY  - JOUR
AU  - Pondělíček, Bedřich
TI  - On permutability in semigroup varieties
JO  - Mathematica Bohemica
PY  - 1991
SP  - 396
EP  - 400
VL  - 116
IS  - 4
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/articles/10.21136/MB.1991.126027/
DO  - 10.21136/MB.1991.126027
LA  - en
ID  - 10_21136_MB_1991_126027
ER  -