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Der Autor dankt der Deutschen Forschungsgemeinschaft für finanzielle Unterstützung
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Häfner, F. Einige orthogonale und symplektische Gruppen als Galoisgruppen über ℚ. Math. Ann. 292, 587–618 (1992). https://doi.org/10.1007/BF01444638
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DOI: https://doi.org/10.1007/BF01444638