TY  - JOUR
AU  - Umar, Abdullahi
TI  - A class of quasi-adequate transformation semigroups.
JO  - Portugaliae mathematica
PY  - 1994
SP  - 553
EP  - 570
VL  - 51
IS  - 4
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/PORMA_1994__51_4_47311/
LA  - en
ID  - PORMA_1994__51_4_47311
ER  -