@article{MZM_2006_79_5_a15,
     author = {O. V. Besov},
     title = {Estimate of the approximation of periodic functions by {Fourier} series},
     journal = {Matemati\v{c}eskie zametki},
     pages = {784--787},
     publisher = {mathdoc},
     volume = {79},
     number = {5},
     year = {2006},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/MZM_2006_79_5_a15/}
}