Voir la notice de l'article provenant de la source European Digital Mathematics Library
@article{SF_1975__11_134133, author = {R.S. Pierce}, title = {Arithmetic {Properties} of certain partially ordered {Semigeroups.}}, journal = {Semigroup forum}, pages = {115--129}, publisher = {mathdoc}, volume = {11}, year = {1975}, zbl = {0334.06006}, url = {http://geodesic.mathdoc.fr/item/SF_1975__11_134133/} }
R.S. Pierce. Arithmetic Properties of certain partially ordered Semigeroups.. Semigroup forum, Tome 11 (1975), pp. 115-129. http://geodesic.mathdoc.fr/item/SF_1975__11_134133/