@article{MZM_1976_20_3_a17,
     author = {S. V. Bochkarev},
     title = {Classes of functions and {Fourier} coefficients with respect to complete orthonormal systems},
     journal = {Matemati\v{c}eskie zametki},
     pages = {445--463},
     publisher = {mathdoc},
     volume = {20},
     number = {3},
     year = {1976},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/MZM_1976_20_3_a17/}
}