TY  - JOUR
AU  - N. P. Korneichuk
TI  - Upper bounds of best approximations on classes of differentiable periodic functions in the metrics~$C$ and $L$
JO  - Doklady Akademii Nauk
PY  - 1970
SP  - 269
EP  - 271
VL  - 190
IS  - 2
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/DAN_1970_190_2_a4/
LA  - ru
ID  - DAN_1970_190_2_a4
ER  -