@article{1103038073, author = {Koch, R. J.}, title = {Ordered semigroups in partially ordered semigroups.}, journal = {Pacific J. Math.}, volume = {10}, number = {4}, year = {1960}, pages = { 1333-1336}, language = {en}, url = {http://dml.mathdoc.fr/item/1103038073} }
Koch, R. J. Ordered semigroups in partially ordered semigroups.. Pacific J. Math., Tome 10 (1960) no. 4, pp. 1333-1336. http://gdmltest.u-ga.fr/item/1103038073/