TY  - JOUR
AU  - T. Nordahl
TI  - Periodic weakly-cancellative semigroups.
JO  - Semigroup forum
PY  - 1976
SP  - 219
EP  - 220
VL  - 13
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/SF_1976__13_134214/
ID  - SF_1976__13_134214
ER  -