@article{DAN_1969_184_1_a3,
     author = {V. A. Il'in},
     title = {A localization principle for almost the whole sequence of partial sums of a {Fourier} series in a fundamental system of functions},
     journal = {Doklady Akademii Nauk},
     pages = {20--23},
     publisher = {mathdoc},
     volume = {184},
     number = {1},
     year = {1969},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1969_184_1_a3/}
}