TY  - JOUR
AU  - O. S. Kravchenko
AU  - B. A. Khesin
TI  - A central extension of the algebra of pseudodifferential symbols
JO  - Funkcionalʹnyj analiz i ego priloženiâ
PY  - 1991
SP  - 83
EP  - 85
VL  - 25
IS  - 2
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/FAA_1991_25_2_a16/
LA  - ru
ID  - FAA_1991_25_2_a16
ER  -