%0 Journal Article %A Jasbir Singh Chahal %T A Note on the Discontinuous Subgroups of the Orthogonal Group. %J Mathematische Zeitschrift %D 1979 %P 181-186 %V 167 %I mathdoc %U http://geodesic.mathdoc.fr/item/MZ_1979__167_172846/ %F MZ_1979__167_172846