@article{GDZPPN00125524X,
title = {Smallest A-ideals in semigroups.},
journal = {Semigroup forum},
volume = {23},
year = {1981},
pages = {297-310},
zbl = {0484.20030},
url = {http://dml.mathdoc.fr/item/GDZPPN00125524X}
}
Satko, L.; Grosek, O. Smallest A-ideals in semigroups.. Semigroup forum, Tome 23 (1981) pp. 297-310. http://gdmltest.u-ga.fr/item/GDZPPN00125524X/