TY  - JOUR
AU  - V. Yu. Popov
TI  - Sharp inequalities for best mean square approximations in a~space of Bessel potentials
JO  - Izvestiâ vysših učebnyh zavedenij. Matematika
PY  - 1982
SP  - 83
EP  - 86
IS  - 1
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/IVM_1982_1_a14/
LA  - ru
ID  - IVM_1982_1_a14
ER  -