%0 Journal Article %A Ya. S. Bugrov %T Linear methods of summing Fourier series and fractional difference operators %J Trudy Matematicheskogo Instituta imeni V.A. Steklova %D 1987 %P 63-65 %V 180 %I mathdoc %U http://geodesic.mathdoc.fr/item/TM_1987_180_a30/ %G ru %F TM_1987_180_a30