@article{GDZPPN00126169X, title = {Magnifying elements in semigroups.}, journal = {Semigroup forum}, volume = {44}, year = {1992}, pages = {314-319}, zbl = {0746.20035}, url = {http://dml.mathdoc.fr/item/GDZPPN00126169X} }
Catino, F.; Migliorini, F. Magnifying elements in semigroups.. Semigroup forum, Tome 44 (1992) pp. 314-319. http://gdmltest.u-ga.fr/item/GDZPPN00126169X/