@article{MZM_2021_110_4_a12,
     author = {E. D. Alferova and A. Yu. Popov},
     title = {On the {Positivity} of {Average} {Sums} of {Sine} {Series} with {Monotone} {Coefficients}},
     journal = {Matemati\v{c}eskie zametki},
     pages = {630--634},
     publisher = {mathdoc},
     volume = {110},
     number = {4},
     year = {2021},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/MZM_2021_110_4_a12/}
}