@article{1102912217, author = {James, D. G.}, title = {On the normal subgroups of integral orthogonal groups.}, journal = {Pacific J. Math.}, volume = {55}, number = {2}, year = {1974}, pages = { 107-114}, language = {en}, url = {http://dml.mathdoc.fr/item/1102912217} }
James, D. G. On the normal subgroups of integral orthogonal groups.. Pacific J. Math., Tome 55 (1974) no. 2, pp. 107-114. http://gdmltest.u-ga.fr/item/1102912217/