%0 Journal Article %A S. V. Bochkarev %T The method of averaging in the theory of orthogonal series and some questions in the theory of bases %J Informatics and Automation %D 1978 %P 3-87 %V 146 %I mathdoc %U http://geodesic.mathdoc.fr/item/TRSPY_1978_146_a0/ %G ru %F TRSPY_1978_146_a0