@article{1183522839, author = {Clifford, A. H.}, title = {Totally ordered commutative semigroups}, journal = {Bull. Amer. Math. Soc.}, volume = {64}, number = {6}, year = {1958}, pages = { 305-316}, language = {en}, url = {http://dml.mathdoc.fr/item/1183522839} }
Clifford, A. H. Totally ordered commutative semigroups. Bull. Amer. Math. Soc., Tome 64 (1958) no. 6, pp. 305-316. http://gdmltest.u-ga.fr/item/1183522839/