@article{MZ_1983__183_173325,
     author = {Franco Napolitani and Giovanni Zacher},
     title = {\"Uber das {Verhalten} der {Normalteiler} unter {Projektivit\"aten.}},
     journal = {Mathematische Zeitschrift},
     pages = {371--380},
     publisher = {mathdoc},
     volume = {183},
     year = {1983},
     zbl = {0517.20011},
     url = {http://geodesic.mathdoc.fr/item/MZ_1983__183_173325/}
}