@article{CMUC_1987__28_2_a7,
     author = {Dr\'apal, Ale\v{s} and Kepka, Tom\'a\v{s}},
     title = {Parity of orthogonal automorphisms},
     journal = {Commentationes Mathematicae Universitatis Carolinae},
     pages = {251--259},
     publisher = {mathdoc},
     volume = {28},
     number = {2},
     year = {1987},
     mrnumber = {904751},
     zbl = {0632.20041},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/CMUC_1987__28_2_a7/}
}