@article{GDZPPN001253069, title = {Some properties of E-m semigroups.}, journal = {Semigroup forum}, volume = {18}, year = {1979}, pages = {153-162}, zbl = {0404.20053}, url = {http://dml.mathdoc.fr/item/GDZPPN001253069} }
Varisco, A.; Cherubini, Spoletini, A. Some properties of E-m semigroups.. Semigroup forum, Tome 18 (1979) pp. 153-162. http://gdmltest.u-ga.fr/item/GDZPPN001253069/