@article{JRAM_1971__249_151129,
     author = {Horst Pfeuffer},
     title = {Quadratsummen in totalreellen algebraischen {Zahlk\"orpern.}},
     journal = {Journal f\"ur die reine und angewandte Mathematik},
     pages = {208--216},
     publisher = {mathdoc},
     volume = {249},
     year = {1971},
     zbl = {0218.12013},
     url = {http://geodesic.mathdoc.fr/item/JRAM_1971__249_151129/}
}