@article{JRAM_1964__213_150592,
     author = {C.T.C. Wall},
     title = {On the orthogonal groups of unimodular quadratic forms. {II.}},
     journal = {Journal f\"ur die reine und angewandte Mathematik},
     pages = {122--136},
     year = {1964},
     volume = {213},
     zbl = {0135.08802},
     url = {http://geodesic.mathdoc.fr/item/JRAM_1964__213_150592/}
}