Voir la notice de l'article provenant de la source European Digital Mathematics Library
@article{SF_1971__2_133835, author = {A.J. Hulin}, title = {Extensions of ordered semigroups.}, journal = {Semigroup forum}, pages = {336--342}, publisher = {mathdoc}, volume = {2}, year = {1971}, zbl = {0225.06006}, url = {http://geodesic.mathdoc.fr/item/SF_1971__2_133835/} }
A.J. Hulin. Extensions of ordered semigroups.. Semigroup forum, Tome 2 (1971), pp. 336-342. http://geodesic.mathdoc.fr/item/SF_1971__2_133835/