@article{SF_1996__53_2_135500,
     author = {M. Gutan},
     title = {Semigroups with strong and nonstrong magnifying elements.},
     journal = {Semigroup forum},
     pages = {384--386},
     publisher = {mathdoc},
     volume = {53},
     number = {2},
     year = {1996},
     zbl = {0859.20050},
     url = {http://geodesic.mathdoc.fr/item/SF_1996__53_2_135500/}
}