Grunewald, Fritz J.; Segal, Daniel The solubility of certain decision problems in arithmetic and algebra. (English) Zbl 0431.20029 Bull. Am. Math. Soc., New Ser. 1, 915-918 (1979). MSC: 20F10 11U05 16P10 11E57 20F18 PDFBibTeX XMLCite \textit{F. J. Grunewald} and \textit{D. Segal}, Bull. Am. Math. Soc., New Ser. 1, 915--918 (1979; Zbl 0431.20029) Full Text: DOI
Ramanathan, K. G. Quadratic forms over involutorial division algebras. II. (English) Zbl 0100.03501 Math. Ann. 143, 293-332 (1961). PDFBibTeX XMLCite \textit{K. G. Ramanathan}, Math. Ann. 143, 293--332 (1961; Zbl 0100.03501) Full Text: DOI EuDML