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@article{MZ_1979__167_172846, author = {Jasbir Singh Chahal}, title = {A {Note} on the {Discontinuous} {Subgroups} of the {Orthogonal} {Group.}}, journal = {Mathematische Zeitschrift}, pages = {181--186}, publisher = {mathdoc}, volume = {167}, year = {1979}, zbl = {0496.10011}, url = {http://geodesic.mathdoc.fr/item/MZ_1979__167_172846/} }
Jasbir Singh Chahal. A Note on the Discontinuous Subgroups of the Orthogonal Group.. Mathematische Zeitschrift, Tome 167 (1979), pp. 181-186. http://geodesic.mathdoc.fr/item/MZ_1979__167_172846/