TY  - JOUR
AU  - Jane M. Day
TI  - Semigroups with periodic properties.
JO  - Semigroup forum
PY  - 1974
SP  - 292
EP  - 309
VL  - 7
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/SF_1974__7_134012/
ID  - SF_1974__7_134012
ER  -