TY  - JOUR
AU  - V. V. Zhuk
TI  - Certain inequalities between best approximations of periodic functions
JO  - Izvestiâ vysših učebnyh zavedenij. Matematika
PY  - 1973
SP  - 18
EP  - 26
IS  - 9
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/IVM_1973_9_a2/
LA  - ru
ID  - IVM_1973_9_a2
ER  -