%0 Journal Article %A Bill Jacob %A Markus Rost %T Degree for cohomological invariants for quadratic forms. %J Inventiones mathematicae %D 1989 %P 551-570 %V 96 %N 1 %I mathdoc %U http://geodesic.mathdoc.fr/item/IM_1989__96_1_143687/ %F IM_1989__96_1_143687