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Research supported by N.R.C. grants A4000 and A8778 resp.
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Hambleton, I., Riehm, C. Splitting of hermitian forms over group rings. Invent Math 45, 19–33 (1978). https://doi.org/10.1007/BF01406221
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DOI: https://doi.org/10.1007/BF01406221