@article{MZM_2004_76_6_a0,
     author = {V. A. Abilov and F. V. Abilova},
     title = {Problems in the {Approximation} of $2\pi${-Periodic} {Functions} by {Fourier} {Sums} in the {Space} $L_2(2\pi)$},
     journal = {Matemati\v{c}eskie zametki},
     pages = {803--811},
     publisher = {mathdoc},
     volume = {76},
     number = {6},
     year = {2004},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/MZM_2004_76_6_a0/}
}