TY  - JOUR
AU  - Hałkowska, Katarzyna
TI  - On some operator defined on equational classes of algebras
JO  - Archivum mathematicum
PY  - 1976
SP  - 209
EP  - 212
VL  - 12
IS  - 4
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/ARM_1976__12_4_a4/
LA  - en
ID  - ARM_1976__12_4_a4
ER  -