%0 Journal Article %A E. V. Troitskii %T An exact $K$-cohomology $C^*$-index formula. I.~Thom isomorphism and topological index %J Vestnik Moskovskogo universiteta. Matematika, mehanika %D 1988 %P 83-85 %N 2 %I mathdoc %U http://geodesic.mathdoc.fr/item/VMUMM_1988_2_a22/ %G ru %F VMUMM_1988_2_a22