%0 Journal Article %A KROPHOLLER, P. H. %A RAJAEI, S. MOHSENI %A SEGAL, J. %T INVARIANT RINGS OF ORTHOGONAL GROUPS OVER ${\mathbb F}_2$ %J Glasgow mathematical journal %D 2005 %P 7-54 %V 47 %N 1 %U http://geodesic.mathdoc.fr/articles/10.1017/S0017089504002198/ %R 10.1017/S0017089504002198 %F 10_1017_S0017089504002198