TY  - JOUR
AU  - Petrich, Mario
TI  - Congruences on simple ω-semigroups
JO  - Glasgow mathematical journal
PY  - 1979
SP  - 87
EP  - 101
VL  - 20
IS  - 2
UR  - http://geodesic.mathdoc.fr/articles/10.1017/S0017089500003785/
DO  - 10.1017/S0017089500003785
ID  - 10_1017_S0017089500003785
ER  -