TY  - JOUR
AU  - Pondělíček, Bedřich
TI  - Direct decomposability of tolerances and congruences on semigroups
JO  - Czechoslovak Mathematical Journal
PY  - 1988
SP  - 701
EP  - 704
VL  - 38
IS  - 4
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/articles/10.21136/CMJ.1988.102265/
DO  - 10.21136/CMJ.1988.102265
LA  - en
ID  - 10_21136_CMJ_1988_102265
ER  -