@article{BUMI_2001_8_4B_2_a13,
     author = {De Falco, Maria},
     title = {Groups with many nearly normal subgroups},
     journal = {Bollettino della Unione matematica italiana},
     pages = {531--540},
     publisher = {mathdoc},
     volume = {Ser. 8, 4B},
     number = {2},
     year = {2001},
     zbl = {1147.20302},
     mrnumber = {327909},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/BUMI_2001_8_4B_2_a13/}
}