%0 Journal Article %A V. A. Skvortsov %T On the rate of approach to zero of the coefficients of null series in the Haar and Walsh systems %J Izvestiya. Mathematics %D 1977 %P 665-676 %V 11 %N 3 %I mathdoc %U http://geodesic.mathdoc.fr/item/IM2_1977_11_3_a9/ %G en %F IM2_1977_11_3_a9