%0 Journal Article %A C.T.C. WALL %T On the Orthogonal Groups of Unimodular Quadratic Forms. %J Mathematische Annalen %D 1962 %P 328-338 %V 147 %I mathdoc %U http://geodesic.mathdoc.fr/item/MAN_1962__147_160975/ %F MAN_1962__147_160975