TY  - JOUR
AU  - V. V. Zhuk
TI  - Certain sharp inequalities between best approximations
JO  - Izvestiâ vysših učebnyh zavedenij. Matematika
PY  - 1973
SP  - 51
EP  - 56
IS  - 1
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/IVM_1973_1_a5/
LA  - ru
ID  - IVM_1973_1_a5
ER  -