@article{MZM_1981_30_4_a3,
     author = {A. S. Belov},
     title = {The {Szidon--Zygmund} inequality in the theory of lacunary trigonometric series},
     journal = {Matemati\v{c}eskie zametki},
     pages = {501--515},
     publisher = {mathdoc},
     volume = {30},
     number = {4},
     year = {1981},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/MZM_1981_30_4_a3/}
}