@article{GDZPPN002422492,
title = {A Note on the Discontinuous Subgroups of the Orthogonal Group.},
journal = {Mathematische Zeitschrift},
volume = {166},
year = {1979},
pages = {181-186},
zbl = {0496.10011},
url = {http://dml.mathdoc.fr/item/GDZPPN002422492}
}
Chahal, Jasbir Singh. A Note on the Discontinuous Subgroups of the Orthogonal Group.. Mathematische Zeitschrift, Tome 166 (1979) pp. 181-186. http://gdmltest.u-ga.fr/item/GDZPPN002422492/