@article{MZM_1993_53_6_a6,
     author = {A. A. Kelzon},
     title = {Sharp estimates of {Fourier--Lagrange} coefficients of functions of bounded variation},
     journal = {Matemati\v{c}eskie zametki},
     pages = {52--62},
     publisher = {mathdoc},
     volume = {53},
     number = {6},
     year = {1993},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/MZM_1993_53_6_a6/}
}