@article{DAN_1961_141_3_a12,
     author = {M. K. Potapov},
     title = {The {Fourier} coefficients of periodic functions belonging to the $H$-classes of {S.\,M.~Nikolʹskii}},
     journal = {Doklady Akademii Nauk},
     pages = {564--567},
     publisher = {mathdoc},
     volume = {141},
     number = {3},
     year = {1961},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1961_141_3_a12/}
}