@article{TIMM_2015_21_4_a7,
     author = {Sh. A. Balgimbaeva and T. I. Smirnov},
     title = {Bounds for {Fourier} widths of classes of periodic functions with a mixed modulus of smoothness},
     journal = {Trudy Instituta matematiki i mehaniki},
     pages = {78--94},
     publisher = {mathdoc},
     volume = {21},
     number = {4},
     year = {2015},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/TIMM_2015_21_4_a7/}
}