@article{GDZPPN001261282,
title = {On a problem in poe-semigroups.},
journal = {Semigroup forum},
volume = {43},
year = {1991},
pages = {260-262},
zbl = {0732.06008},
url = {http://dml.mathdoc.fr/item/GDZPPN001261282}
}
Murty, P.V. Ramana; Rao, S. Hanumantha. On a problem in poe-semigroups.. Semigroup forum, Tome 43 (1991) pp. 260-262. http://gdmltest.u-ga.fr/item/GDZPPN001261282/