TY  - JOUR
AU  - J. Almeida
TI  - Some quasi-ordered classes of finite commutative semigroups.
JO  - Semigroup forum
PY  - 1985
SP  - 189
EP  - 200
VL  - 32
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/SF_1985__32_134779/
ID  - SF_1985__32_134779
ER  -