@article{JRAM_1913__143_149402,
     author = {H. Brandt},
     title = {Zur {Komposition} der quatern\"aren quadratischen {Formen.}},
     journal = {Journal f\"ur die reine und angewandte Mathematik},
     pages = {106--127},
     publisher = {mathdoc},
     volume = {143},
     year = {1913},
     zbl = {44.0253.02},
     url = {http://geodesic.mathdoc.fr/item/JRAM_1913__143_149402/}
}