@article{GDZPPN001264184,
title = {Pseudoorder in ordered semigroups.},
journal = {Semigroup forum},
volume = {51},
year = {1995},
pages = {389-392},
zbl = {0828.06010},
url = {http://dml.mathdoc.fr/item/GDZPPN001264184}
}
Kehayopulu, N.; Tsingelis, M. Pseudoorder in ordered semigroups.. Semigroup forum, Tome 51 (1995) pp. 389-392. http://gdmltest.u-ga.fr/item/GDZPPN001264184/