TY  - JOUR
AU  - I. M. Petrov
TI  - The order of approximation of functions of class $Z\alpha$ by certain polynomial operators
JO  - Izvestiâ vysših učebnyh zavedenij. Matematika
PY  - 1960
SP  - 188
EP  - 193
IS  - 1
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/IVM_1960_1_a19/
LA  - ru
ID  - IVM_1960_1_a19
ER  -