TY  - JOUR
AU  - T.E. Hays
TI  - Irreducible semigroups are monotone.
JO  - Semigroup forum
PY  - 1975
SP  - 25
EP  - 31
VL  - 10
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/SF_1975__10_134096/
ID  - SF_1975__10_134096
ER  -