@article{DAN_1977_235_5_a12,
     author = {P. L. Ul'yanov},
     title = {On {Weyl} multipliers for unconditional convergence of orthogonal series},
     journal = {Doklady Akademii Nauk},
     pages = {1038--1041},
     publisher = {mathdoc},
     volume = {235},
     number = {5},
     year = {1977},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1977_235_5_a12/}
}