TY  - JOUR
AU  - R.S. Pierce
TI  - Arithmetic Properties of certain partially ordered Semigeroups.
JO  - Semigroup forum
PY  - 1975
SP  - 115
EP  - 129
VL  - 11
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/SF_1975__11_134133/
ID  - SF_1975__11_134133
ER  -