%0 Journal Article %A A. S. Belov %T On Conditions of the Average Convergence (Upper Boundedness) of Trigonometric Series %J Contemporary Mathematics. Fundamental Directions %D 2007 %P 8-20 %V 25 %I mathdoc %U http://geodesic.mathdoc.fr/item/CMFD_2007_25_a1/ %G ru %F CMFD_2007_25_a1