@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/