@article{CHEB_2016_17_4_a10,
     author = {K.Tukhliev},
     title = {Mean-square approximation of functions by {Fourier--Bessel} series and the values of widths for some functional classes},
     journal = {\v{C}eby\v{s}evskij sbornik},
     pages = {141--156},
     publisher = {mathdoc},
     volume = {17},
     number = {4},
     year = {2016},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/CHEB_2016_17_4_a10/}
}