@article{GDZPPN001261681, title = {On left regular and left duo poe-semigroups.}, journal = {Semigroup forum}, volume = {44}, year = {1992}, pages = {306-313}, zbl = {0756.06007}, url = {http://dml.mathdoc.fr/item/GDZPPN001261681} }
Kehayopulu, N. On left regular and left duo poe-semigroups.. Semigroup forum, Tome 44 (1992) pp. 306-313. http://gdmltest.u-ga.fr/item/GDZPPN001261681/