@article{SM_1995_186_11_a4,
     author = {S. A. Telyakovskii},
     title = {Estimating the integral of the~derivative of the~sum of a~trigonometric series with quasi-convex coefficients},
     journal = {Sbornik. Mathematics},
     pages = {1659--1669},
     year = {1995},
     volume = {186},
     number = {11},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/SM_1995_186_11_a4/}
}