TY  - JOUR
AU  - A. I. Stepanets
TI  - Simultaneous approximation of periodic functions and their derivatives by Fourier sums
JO  - Doklady Akademii Nauk
PY  - 1980
SP  - 543
EP  - 544
VL  - 254
IS  - 3
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/DAN_1980_254_3_a6/
LA  - ru
ID  - DAN_1980_254_3_a6
ER  -