%0 Journal Article %A E. Bayer-Fluckiger %A R. Parimala %A J-P. Serre %T Hasse principle for $G$-trace forms %J Izvestiya. Mathematics %D 2013 %P 437-460 %V 77 %N 3 %I mathdoc %U http://geodesic.mathdoc.fr/item/IM2_2013_77_3_a1/ %G en %F IM2_2013_77_3_a1