@article{MZ_1965__87_170367,
     author = {Helmut Karzel},
     title = {Projektive {R\"aume} mit einer kommutativen transitiven {Kollineationsgruppe.}},
     journal = {Mathematische Zeitschrift},
     pages = {74--77},
     publisher = {mathdoc},
     volume = {87},
     year = {1965},
     zbl = {0135.39501},
     url = {http://geodesic.mathdoc.fr/item/MZ_1965__87_170367/}
}