@article{SM_1973_20_4_a4,
     author = {S. A. Telyakovskii},
     title = {Integrability of trigonometric series. {The} estimation of the integral modulus of continuity},
     journal = {Sbornik. Mathematics},
     pages = {557--573},
     publisher = {mathdoc},
     volume = {20},
     number = {4},
     year = {1973},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/SM_1973_20_4_a4/}
}