@article{UZKU_1955_115_14_a7,
     author = {V. S. Fedulov},
     title = {Generalization of two theorems of {A.} {N.~Kolmogorov} or lacunary sequences},
     journal = {U\v{c}\"enye zapiski Kazanskogo universiteta. Seri\^a Fiziko-matemati\v{c}eskie nauki},
     pages = {87--95},
     publisher = {mathdoc},
     volume = {115},
     number = {14},
     year = {1955},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/UZKU_1955_115_14_a7/}
}