@article{MZM_1967_2_3_a6,
     author = {A. I. Rubinshtein},
     title = {Series with monotonic coefficients in a {Walsh} system},
     journal = {Matemati\v{c}eskie zametki},
     pages = {279--288},
     year = {1967},
     volume = {2},
     number = {3},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/MZM_1967_2_3_a6/}
}