%0 Journal Article %A A. Yu. Petrovich %T Properties of Riemann sums for functions representable by a trigonometric series with monotone coefficients %J Sbornik. Mathematics %D 1975 %P 331-347 %V 26 %N 3 %U http://geodesic.mathdoc.fr/item/SM_1975_26_3_a2/ %G en %F SM_1975_26_3_a2