TY  - JOUR
AU  - L. Polák
TI  - On varieties of completely regular semigroups.
JO  - Semigroup forum
PY  - 1985
SP  - 97
EP  - 123
VL  - 32
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/SF_1985__32_134771/
ID  - SF_1985__32_134771
ER  -