TY  - JOUR
AU  - B. V. Fedosov
TI  - Direct proof of the formula for the index of an elliptic system in euclidean space
JO  - Funkcionalʹnyj analiz i ego priloženiâ
PY  - 1970
SP  - 83
EP  - 84
VL  - 4
IS  - 4
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/FAA_1970_4_4_a14/
LA  - ru
ID  - FAA_1970_4_4_a14
ER  -