@article{MZ_1971__123_171635,
     author = {Karl H. Wehrhahn},
     title = {Projectivities in {Finite} {Abelian} {p-Groups.}},
     journal = {Mathematische Zeitschrift},
     pages = {231--240},
     publisher = {mathdoc},
     volume = {123},
     year = {1971},
     zbl = {0213.30902},
     url = {http://geodesic.mathdoc.fr/item/MZ_1971__123_171635/}
}