1. J. K. Arason and A. Pfister, Beweis des Krullschen Durchschnittsatzes für den Wittring, to appear.
2. R. Elman and T. Y. Lam, Determination of kn (n ⩾ 3) for global fields, Proc. Amer. Math. Soc., to appear.
3. University of Kentucky Lectures;Harrison,1970
4. Algebraic K-theory and quadratic forms;Milnor;Invent. Math.,1970