%0 Journal Article %A V. A. Skvortsov %T $A$-integrable martingale sequences and Walsh series %J Izvestiya. Mathematics %D 2001 %P 607-615 %V 65 %N 3 %I mathdoc %U http://geodesic.mathdoc.fr/item/IM2_2001_65_3_a9/ %G en %F IM2_2001_65_3_a9