@article{BUMI_2003_8_6B_3_a17,
     author = {De Falco, Maria and Musella, Carmela},
     title = {Some lattice properties of normal-by-finite subgroups},
     journal = {Bollettino della Unione matematica italiana},
     pages = {763--771},
     publisher = {mathdoc},
     volume = {Ser. 8, 6B},
     number = {3},
     year = {2003},
     zbl = {1119.20031},
     mrnumber = {1355229},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/BUMI_2003_8_6B_3_a17/}
}