%0 Journal Article %A Gunther, Georg %T Singular Isometries in Orthogonal Groups %J Canadian mathematical bulletin %D 1977 %P 189-198 %V 20 %N 2 %U http://geodesic.mathdoc.fr/articles/10.4153/CMB-1977-031-6/ %R 10.4153/CMB-1977-031-6 %F 10_4153_CMB_1977_031_6