@article{MZ_1936__41_168653,
     author = {G. K\"othe},
     title = {Das {Tr\"agheitsgesetz} der quadratischen {Formen} im {Hilbertschen} {Raum}},
     journal = {Mathematische Zeitschrift},
     pages = {137--152},
     publisher = {mathdoc},
     volume = {41},
     year = {1936},
     zbl = {0013.40404},
     url = {http://geodesic.mathdoc.fr/item/MZ_1936__41_168653/}
}