@article{GDZPPN002367920, title = {Bilineare Transformation quatern\"arer quadratischer Formen}, journal = {Mathematische Zeitschrift}, volume = {20}, year = {1924}, pages = {223-230}, zbl = {50.0054.02}, url = {http://dml.mathdoc.fr/item/GDZPPN002367920} }
Brandt, H. Bilineare Transformation quaternärer quadratischer Formen. Mathematische Zeitschrift, Tome 20 (1924) pp. 223-230. http://gdmltest.u-ga.fr/item/GDZPPN002367920/