@article{GDZPPN002258692,
title = {The hyperorthogonal groups},
journal = {Mathematische Annalen},
volume = {55},
year = {1902},
pages = {521-572},
zbl = {33.0151.02},
url = {http://dml.mathdoc.fr/item/GDZPPN002258692}
}
Dickson, Leonard Eugen. The hyperorthogonal groups. Mathematische Annalen, Tome 55 (1902) pp. 521-572. http://gdmltest.u-ga.fr/item/GDZPPN002258692/