%0 Journal Article
%A B. V. Fedosov
%T A~periodicity theorem in the algebra of symbols
%J Sbornik. Mathematics
%D 1978
%P 382-410
%V 34
%N 3
%I mathdoc
%U http://geodesic.mathdoc.fr/item/SM_1978_34_3_a6/
%G en
%F SM_1978_34_3_a6