TY  - JOUR
AU  - V. N. Polyakov
TI  - A~multiplication theorem for the characteristic functions of linear operators
JO  - Izvestiâ vysših učebnyh zavedenij. Matematika
PY  - 1973
SP  - 73
EP  - 76
IS  - 5
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/IVM_1973_5_a9/
LA  - ru
ID  - IVM_1973_5_a9
ER  -