%0 Journal Article %A S. B. Stechkin %T Mean values of the modulus of a~trigonometric sum %J Informatics and Automation %D 1975 %P 283-309 %V 134 %I mathdoc %U http://geodesic.mathdoc.fr/item/TRSPY_1975_134_a20/ %G ru %F TRSPY_1975_134_a20