@article{JRAM_1974__0268_0269_151452,
     author = {Ludwig Br\"ocker},
     title = {Zur orthogonalen {Geometrie} \"uber pythagoreischen {K\"orpern.}},
     journal = {Journal f\"ur die reine und angewandte Mathematik},
     pages = {68--77},
     publisher = {mathdoc},
     volume = {0268_0269},
     year = {1974},
     zbl = {0376.10019},
     url = {http://geodesic.mathdoc.fr/item/JRAM_1974__0268_0269_151452/}
}