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@article{MAN_1989__283_1_164520, author = {C. Riehm}, title = {The {Quadratic} {Schur} {Subgroup} over {Local} and {Global} {Fields.}}, journal = {Mathematische Annalen}, pages = {479--490}, publisher = {mathdoc}, volume = {283}, number = {1}, year = {1989}, zbl = {0642.12013}, url = {http://geodesic.mathdoc.fr/item/MAN_1989__283_1_164520/} }
C. Riehm. The Quadratic Schur Subgroup over Local and Global Fields.. Mathematische Annalen, Tome 283 (1989) no. 1, pp. 479-490. http://geodesic.mathdoc.fr/item/MAN_1989__283_1_164520/