@article{MZ_1929__30_168120,
     author = {A. Wintner},
     title = {Zur {Theorie} der beschr\"ankten {Bilinearformen}},
     journal = {Mathematische Zeitschrift},
     pages = {228--282},
     publisher = {mathdoc},
     volume = {30},
     year = {1929},
     zbl = {55.0826.01},
     url = {http://geodesic.mathdoc.fr/item/MZ_1929__30_168120/}
}