@article{MZ_1922__12_167683,
     author = {I. Schur},
     title = {Ein {Beitrag} zur {Hilbertschen} {Theorie} der vollstetigen quadratischen {Formen}},
     journal = {Mathematische Zeitschrift},
     pages = {287--297},
     publisher = {mathdoc},
     volume = {12},
     year = {1922},
     zbl = {48.0475.03},
     url = {http://geodesic.mathdoc.fr/item/MZ_1922__12_167683/}
}