%0 Journal Article %A R. I. Ovsepian %T On the extraction, from general systems, of lacunary subsystems with the absolute convergence property %J Sbornik. Mathematics %D 1981 %P 469-477 %V 39 %N 4 %I mathdoc %U http://geodesic.mathdoc.fr/item/SM_1981_39_4_a2/ %G en %F SM_1981_39_4_a2