TY  - JOUR
AU  - P.G. Trotter
TI  - A class of semigroups embeddable in groups.
JO  - Semigroup forum
PY  - 1972
SP  - 1
EP  - 13
VL  - 5
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/SF_1972__5_133920/
ID  - SF_1972__5_133920
ER  -