@article{VMUMM_2014_4_a7,
     author = {A. Yu. Popov and A. P. Solodov},
     title = {Exact lower estimate of the upper limit of the ratio of the sum of sine series with monotone coefficients to its majorant},
     journal = {Vestnik Moskovskogo universiteta. Matematika, mehanika},
     pages = {51--55},
     year = {2014},
     number = {4},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/VMUMM_2014_4_a7/}
}