TY  - JOUR
AU  - I. Levi
TI  - On the set of ranges of a transformation semigroup.
JO  - Semigroup forum
PY  - 1985
SP  - 219
EP  - 226
VL  - 31
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/SF_1985__31_134748/
ID  - SF_1985__31_134748
ER  -