@article{00763835, title = {A class of quasi-adequate transformation semigroups.}, journal = {Portugaliae Mathematica. Nova S\'erie}, volume = {51}, year = {1994}, pages = {553-570}, zbl = {0828.20066}, language = {en}, url = {http://dml.mathdoc.fr/item/00763835} }
Umar, Abdullahi. A class of quasi-adequate transformation semigroups.. Portugaliae Mathematica. Nova Série, Tome 51 (1994) pp. 553-570. http://gdmltest.u-ga.fr/item/00763835/