@article{10_4153_CMB_1977_031_6,
     author = {Gunther, Georg},
     title = {Singular {Isometries} in {Orthogonal} {Groups}},
     journal = {Canadian mathematical bulletin},
     pages = {189--198},
     year = {1977},
     volume = {20},
     number = {2},
     doi = {10.4153/CMB-1977-031-6},
     url = {http://geodesic.mathdoc.fr/articles/10.4153/CMB-1977-031-6/}
}