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@article{IM_1984__77_143157, author = {Frank III Gerth}, title = {The 4-class ranks of quadratic fields related to the {Weyl} group algebra.}, journal = {Inventiones mathematicae}, pages = {489--516}, publisher = {mathdoc}, volume = {77}, year = {1984}, zbl = {0533.12004}, url = {http://geodesic.mathdoc.fr/item/IM_1984__77_143157/} }
Frank III Gerth. The 4-class ranks of quadratic fields related to the Weyl group algebra.. Inventiones mathematicae, Tome 77 (1984), pp. 489-516. http://geodesic.mathdoc.fr/item/IM_1984__77_143157/