%0 Journal Article %A M. G. Grigoryan %T On universal (in the sense of signs) Fourier series with respect to the Walsh system %J Sbornik. Mathematics %D 2024 %P 717-742 %V 215 %N 6 %I mathdoc %U http://geodesic.mathdoc.fr/item/SM_2024_215_6_a0/ %G en %F SM_2024_215_6_a0