@article{MZM_1982_32_3_a3,
     author = {V. I. Ovchinnikov and V. D. Raspopova and V. A. Rodin},
     title = {Sharp estimates of the {Fourier} coefficients of summable functions and $K$-functionals},
     journal = {Matemati\v{c}eskie zametki},
     pages = {295--302},
     publisher = {mathdoc},
     volume = {32},
     number = {3},
     year = {1982},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/MZM_1982_32_3_a3/}
}