@article{GDZPPN001259113,
title = {Monoids characterized by their quasi-injective S-systems.},
journal = {Semigroup forum},
volume = {36},
year = {1987},
pages = {285-292},
zbl = {0625.20057},
url = {http://dml.mathdoc.fr/item/GDZPPN001259113}
}
Ahsan, J. Monoids characterized by their quasi-injective S-systems.. Semigroup forum, Tome 36 (1987) pp. 285-292. http://gdmltest.u-ga.fr/item/GDZPPN001259113/