%0 Journal Article
%A Richard Elman
%A T.Y. Lam
%T Quadratic Forms and the ?-Invariant. II.
%J Inventiones mathematicae
%D 1973
%P 125-138
%V 21
%I mathdoc
%U http://geodesic.mathdoc.fr/item/IM_1973__21_142222/
%F IM_1973__21_142222