TY  - JOUR
AU  - B. V. Fedosov
TI  - A~periodicity theorem in the algebra of symbols
JO  - Sbornik. Mathematics
PY  - 1978
SP  - 382
EP  - 410
VL  - 34
IS  - 3
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/SM_1978_34_3_a6/
LA  - en
ID  - SM_1978_34_3_a6
ER  -