%0 Journal Article %A A. A. Talalyan %T On~approximation properties of certain incomplete systems %J Sbornik. Mathematics %D 1982 %P 443-471 %V 43 %N 4 %I mathdoc %U http://geodesic.mathdoc.fr/item/SM_1982_43_4_a0/ %G en %F SM_1982_43_4_a0