@article{MZM_2017_101_4_a7,
     author = {A. O. Radomskii},
     title = {On a {Sidon-type} {Inequality} for {Discrete} {Orthonormal} {Systems}},
     journal = {Matemati\v{c}eskie zametki},
     pages = {582--587},
     publisher = {mathdoc},
     volume = {101},
     number = {4},
     year = {2017},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/MZM_2017_101_4_a7/}
}