%0 Journal Article %A V. F. Gaposhkin %T The haar system as an unconditional basis in $L_p[0, 1]$ %J Matematičeskie zametki %D 1974 %P 191-196 %V 15 %N 2 %I mathdoc %U http://geodesic.mathdoc.fr/item/MZM_1974_15_2_a1/ %G ru %F MZM_1974_15_2_a1