Media type: E-Article Title: Quadratic forms and theu-invariant. I Contributor: Elman, Richard; Lam, Tsit-Yuen Published: Springer Science and Business Media LLC, 1973 Published in: Mathematische Zeitschrift, 131 (1973) 4, Seite 283-304 Language: English DOI: 10.1007/bf01174904 ISSN: 0025-5874; 1432-1823 Keywords: General Mathematics Origination: Footnote: Access State: Open Access