@article{MZ_1923__17_167734,
     author = {H., Brandt},
     title = {Bilineare {Transformation} quadratischer {Formen}},
     journal = {Mathematische Zeitschrift},
     pages = {153--160},
     publisher = {mathdoc},
     volume = {17},
     year = {1923},
     zbl = {49.0074.01},
     url = {http://geodesic.mathdoc.fr/item/MZ_1923__17_167734/}
}