%0 Journal Article %A S. V. Bochkarev %T A Generalization of Kolmogorov's Theorem to Biorthogonal Systems %J Informatics and Automation %D 2008 %P 44-56 %V 260 %I mathdoc %U http://geodesic.mathdoc.fr/item/TRSPY_2008_260_a3/ %G ru %F TRSPY_2008_260_a3