TY  - JOUR
AU  - K. Ahre
TI  - On the closure of the bicyclic semigroup.
JO  - Semigroup forum
PY  - 1982
SP  - 379
EP  - 380
VL  - 25
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/SF_1982__25_134586/
ID  - SF_1982__25_134586
ER  -