@article{SF_1976__12_134170,
     author = {T. Merlier},
     title = {Note on the orderability of idempotent semigroups.},
     journal = {Semigroup forum},
     pages = {183--184},
     year = {1976},
     volume = {12},
     zbl = {0328.06010},
     url = {http://geodesic.mathdoc.fr/item/SF_1976__12_134170/}
}