1. Artin, E.: Algebraic numbers and algebraic functions. New York: Gordon and Breach 1967.
2. Lecture Notes in Mathematics;H. Bass,1969
3. Bass, H.: Tate, J.:K 2 of global fields (in preparation).
4. Birch, B. J.:K 2 of global fields (mimeographed proceedings of conference, S.U.N.Y. Stony Brook 1969).
5. Delzant, A.: Definition des classes de Stiefel-Whitney d'un module quadratique sur un corps de caractéristique différente de 2. C. R. Acad. Sci. Paris255, 1366?1368 (1962).