@article{GDZPPN001253921,
title = {Quasi-ideals in rings and semigroups},
journal = {Semigroup forum},
volume = {20},
year = {1980},
pages = {371-372},
url = {http://dml.mathdoc.fr/item/GDZPPN001253921}
}
Steinfeld, O. Quasi-ideals in rings and semigroups. Semigroup forum, Tome 20 (1980) pp. 371-372. http://gdmltest.u-ga.fr/item/GDZPPN001253921/