%0 Journal Article %A A. I. Stepanets %T Approximation of periodic functions by Fourier sums %J Informatics and Automation %D 1987 %P 202-204 %V 180 %I mathdoc %U http://geodesic.mathdoc.fr/item/TRSPY_1987_180_a123/ %G ru %F TRSPY_1987_180_a123