%0 Journal Article
%A B. V. Fedosov
%T Direct proof of the formula for the index of an elliptic system in euclidean space
%J Funkcionalʹnyj analiz i ego priloženiâ
%D 1970
%P 83-84
%V 4
%N 4
%I mathdoc
%U http://geodesic.mathdoc.fr/item/FAA_1970_4_4_a14/
%G ru
%F FAA_1970_4_4_a14