@article{02133899, title = {Divisibility orders on semigroups. II.}, journal = {Mathematica Pannonica}, volume = {15}, year = {2004}, pages = {3-20}, zbl = {1064.20058}, language = {en}, url = {http://dml.mathdoc.fr/item/02133899} }
Mitsch, H. Divisibility orders on semigroups. II.. Mathematica Pannonica, Tome 15 (2004) pp. 3-20. http://gdmltest.u-ga.fr/item/02133899/