TY  - JOUR
AU  - A. Ali Ismaeel
TI  - On some problems of Petrich concerning Brück and Reilly semigroups.
JO  - Semigroup forum
PY  - 1992
SP  - 283
EP  - 287
VL  - 45
IS  - 3
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/SF_1992__45_3_135192/
ID  - SF_1992__45_3_135192
ER  -