@article{JRAM_1949__186_150154,
     author = {Annemarie Kretschmer},
     title = {Die projektiven {Involutionen} des n-dimensionalen {Raumes.}},
     journal = {Journal f\"ur die reine und angewandte Mathematik},
     pages = {241--253},
     publisher = {mathdoc},
     volume = {186},
     year = {1949},
     zbl = {0035.10002},
     url = {http://geodesic.mathdoc.fr/item/JRAM_1949__186_150154/}
}