@article{1102983914, author = {Levin, Richard G.}, title = {On commutative, nonpotent archimedean semigroups.}, journal = {Pacific J. Math.}, volume = {27}, number = {3}, year = {1968}, pages = { 365-371}, language = {en}, url = {http://dml.mathdoc.fr/item/1102983914} }
Levin, Richard G. On commutative, nonpotent archimedean semigroups.. Pacific J. Math., Tome 27 (1968) no. 3, pp. 365-371. http://gdmltest.u-ga.fr/item/1102983914/