%0 Journal Article %A B. V. Fedosov %T The index theorem in the algebra of quantum observables %J Doklady Akademii Nauk %D 1989 %P 835-838 %V 305 %N 4 %I mathdoc %U http://geodesic.mathdoc.fr/item/DAN_1989_305_4_a15/ %G ru %F DAN_1989_305_4_a15