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@article{MZ_1987__196_173889, author = {J. Mennicke and J. Elstrodt and F. Grunewald}, title = {Vahlen's {Group} of {Clifford} {Matrices} and {Spin-Groups.}}, journal = {Mathematische Zeitschrift}, pages = {369--390}, publisher = {mathdoc}, volume = {196}, year = {1987}, zbl = {0611.20027}, url = {http://geodesic.mathdoc.fr/item/MZ_1987__196_173889/} }
J. Mennicke; J. Elstrodt; F. Grunewald. Vahlen's Group of Clifford Matrices and Spin-Groups.. Mathematische Zeitschrift, Tome 196 (1987), pp. 369-390. http://geodesic.mathdoc.fr/item/MZ_1987__196_173889/