TY  - JOUR
AU  - A. Yu. Popov
TI  - Refinement of Estimates of Sums of Sine Series with Monotone Coefficients and Cosine Series with Convex Coefficients
JO  - Matematičeskie zametki
PY  - 2021
SP  - 768
EP  - 780
VL  - 109
IS  - 5
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/MZM_2021_109_5_a8/
LA  - ru
ID  - MZM_2021_109_5_a8
ER  -