@article{GDZPPN002434199,
title = {Vahlen's Group of Clifford Matrices and Spin-Groups.},
journal = {Mathematische Zeitschrift},
volume = {194},
year = {1987},
pages = {369-390},
zbl = {0611.20027},
url = {http://dml.mathdoc.fr/item/GDZPPN002434199}
}
Mennicke, J.; Elstrodt, J.; Grunewald, F. Vahlen's Group of Clifford Matrices and Spin-Groups.. Mathematische Zeitschrift, Tome 194 (1987) pp. 369-390. http://gdmltest.u-ga.fr/item/GDZPPN002434199/