@article{JRAM_1956__196_150324,
     author = {Martin Kneser},
     title = {Orthogonale {Gruppen} \"uber algebraischen {Zahlk\"orpern.}},
     journal = {Journal f\"ur die reine und angewandte Mathematik},
     pages = {213--220},
     publisher = {mathdoc},
     volume = {196},
     year = {1956},
     zbl = {0070.25801},
     url = {http://geodesic.mathdoc.fr/item/JRAM_1956__196_150324/}
}