@article{GDZPPN001255770,
title = {Generalized ideal elements in poe-semigroups.},
journal = {Semigroup forum},
volume = {24},
year = {1982},
pages = {213-222},
zbl = {0499.06012},
url = {http://dml.mathdoc.fr/item/GDZPPN001255770}
}
Kehayopulu, N. Generalized ideal elements in poe-semigroups.. Semigroup forum, Tome 24 (1982) pp. 213-222. http://gdmltest.u-ga.fr/item/GDZPPN001255770/