@article{MAN_1938__115_159951,
     author = {St. Cohn-Vossen},
     title = {Die {Kollineationen} des n-dimensionalen {Raumes}},
     journal = {Mathematische Annalen},
     pages = {80--86},
     publisher = {mathdoc},
     volume = {115},
     year = {1938},
     zbl = {0017.22003},
     url = {http://geodesic.mathdoc.fr/item/MAN_1938__115_159951/}
}