@article{DAN_1992_322_2_a8,
     author = {P. L. Ul'yanov},
     title = {Absolute convergence of trigonometric {Fourier} series},
     journal = {Doklady Akademii Nauk},
     pages = {253--258},
     publisher = {mathdoc},
     volume = {322},
     number = {2},
     year = {1992},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1992_322_2_a8/}
}