@article{SF_1992__44_1_135154,
     author = {F. Catino and F. Migliorini},
     title = {Magnifying elements in semigroups.},
     journal = {Semigroup forum},
     pages = {314--319},
     publisher = {mathdoc},
     volume = {44},
     number = {1},
     year = {1992},
     zbl = {0746.20035},
     url = {http://geodesic.mathdoc.fr/item/SF_1992__44_1_135154/}
}