@article{GDZPPN001251279, title = {Note on the orderability of idempotent semigroups.}, journal = {Semigroup forum}, volume = {12}, year = {1976}, pages = {183-184}, zbl = {0328.06010}, url = {http://dml.mathdoc.fr/item/GDZPPN001251279} }
Merlier, T. Note on the orderability of idempotent semigroups.. Semigroup forum, Tome 12 (1976) pp. 183-184. http://gdmltest.u-ga.fr/item/GDZPPN001251279/