@article{GDZPPN001253050, title = {Semilattices of left reversible semigroups.}, journal = {Semigroup forum}, volume = {18}, year = {1979}, pages = {139-152}, zbl = {0402.20047}, url = {http://dml.mathdoc.fr/item/GDZPPN001253050} }
Osondu, K.E. Semilattices of left reversible semigroups.. Semigroup forum, Tome 18 (1979) pp. 139-152. http://gdmltest.u-ga.fr/item/GDZPPN001253050/