TY  - JOUR
AU  - J. Yuan
TI  - A note on angular semigroups.
JO  - Semigroup forum
PY  - 1980
SP  - 261
EP  - 266
VL  - 19
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/SF_1980__19_134387/
ID  - SF_1980__19_134387
ER  -