@article{IM2_1977_11_3_a9,
     author = {V. A. Skvortsov},
     title = {On the rate of approach to zero of the coefficients of null series in the {Haar} and {Walsh} systems},
     journal = {Izvestiya. Mathematics},
     pages = {665--676},
     year = {1977},
     volume = {11},
     number = {3},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/IM2_1977_11_3_a9/}
}