TY  - JOUR
AU  - Diana Lindsey
TI  - Relations Invariant under semigroup actions.
JO  - Semigroup forum
PY  - 1974
SP  - 298
EP  - 311
VL  - 8
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/SF_1974__8_134049/
ID  - SF_1974__8_134049
ER  -