@article{GDZPPN002244438, title = {Zur Theorie der orthogonalen Substitutionen}, journal = {Mathematische Annalen}, volume = {13}, year = {1878}, pages = {320-374}, url = {http://dml.mathdoc.fr/item/GDZPPN002244438} }
Voss. Zur Theorie der orthogonalen Substitutionen. Mathematische Annalen, Tome 13 (1878) pp. 320-374. http://gdmltest.u-ga.fr/item/GDZPPN002244438/