%0 Journal Article %A V. I. Chernousov %A L. M. Timoshenko %T On the group of $R$-equivalence classes of semisimple groups over arithmetic fields %J Algebra i analiz %D 1999 %P 191-221 %V 11 %N 6 %I mathdoc %U http://geodesic.mathdoc.fr/item/AA_1999_11_6_a7/ %G ru %F AA_1999_11_6_a7