@article{MZ_1970__117_171412,
     author = {Helmut Salzmann},
     title = {Kollineationsgruppen kompakter, vier-dimensionaler {Ebenen.}},
     journal = {Mathematische Zeitschrift},
     pages = {112--124},
     publisher = {mathdoc},
     volume = {117},
     year = {1970},
     zbl = {0205.50104},
     url = {http://geodesic.mathdoc.fr/item/MZ_1970__117_171412/}
}