@article{DAN_1975_220_5_a4,
     author = {R. I. Gurielashvili},
     title = {On the convergence and boundedness in $\psi(L)$ of the {Fourier} series of a monotone function},
     journal = {Doklady Akademii Nauk},
     pages = {1015--1018},
     year = {1975},
     volume = {220},
     number = {5},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1975_220_5_a4/}
}