@article{DAN_1968_183_2_a1,
     author = {V. Ya. Arsenin},
     title = {The optimal summation of {Fourier} series with approximate coefficients},
     journal = {Doklady Akademii Nauk},
     pages = {257--260},
     publisher = {mathdoc},
     volume = {183},
     number = {2},
     year = {1968},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1968_183_2_a1/}
}