@article{DAN_1964_156_2_a8,
     author = {A. N. Tikhonov},
     title = {On stable summability methods for {Fourier} series},
     journal = {Doklady Akademii Nauk},
     pages = {268--271},
     publisher = {mathdoc},
     volume = {156},
     number = {2},
     year = {1964},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1964_156_2_a8/}
}