TY  - JOUR
AU  - George M. Bergman
TI  - Hyperidentities of groups and semigroups.
JO  - Aequationes mathematicae
PY  - 1981
SP  - 50
EP  - 65
VL  - 23
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/AM2_1981__23_136890/
ID  - AM2_1981__23_136890
ER  -