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@article{JRAM_1962__211_150558, author = {Barth Pollak}, title = {4-dimensional {Orthogonal} {Groups} over {Algebraic} {Number} {Fields.}}, journal = {Journal f\"ur die reine und angewandte Mathematik}, pages = {176--178}, publisher = {mathdoc}, volume = {211}, year = {1962}, zbl = {0118.03903}, url = {http://geodesic.mathdoc.fr/item/JRAM_1962__211_150558/} }
Barth Pollak. 4-dimensional Orthogonal Groups over Algebraic Number Fields.. Journal für die reine und angewandte Mathematik, Tome 211 (1962), pp. 176-178. http://geodesic.mathdoc.fr/item/JRAM_1962__211_150558/