References
Bröcker, L.: Zur Theorie der quadratischen Formen über formal reellen Körpern Math. Ann.210, 233–256 (1974)
Elman, R., Lam, T. Y., Prestel, A.: On some Hasse Principles over Real Fields. Math. Z.134, 291–301 (1973)
Krull, W.: Allgemeine Bewertungstheorie. J. reine angew. Math.167, 160–196 (1932)
Prestel, A.: Quadratische Semi-Ordnungen und quadratische Formen. Math. Z.133, 319–342 (1973)
Prestel, A.: Lectures on Formally Real Fields. Monografias de Matemática, IMPA, Rio de Janeiro. (To appear)
Witt, E.: Theorie der quadratischen Formen in beliebigen Körpern. J. reine angew. Math.176, 31–44 (1937)
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This paper was written during the author's stay at IMPA which took place under the German-Brazilian cooperation agreement GMD-CNPq.
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Prestel, A. A local-global principle for quadratic forms. Math Z 142, 91–95 (1975). https://doi.org/10.1007/BF01214851
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DOI: https://doi.org/10.1007/BF01214851