%0 Journal Article %A Yu. V. Muranov %T Splitting obstruction groups and quadratic extensions of anti-structures %J Izvestiya. Mathematics %D 1995 %P 1207-1232 %V 59 %N 6 %I mathdoc %U http://geodesic.mathdoc.fr/item/IM2_1995_59_6_a5/ %G en %F IM2_1995_59_6_a5