%0 Journal Article %A D. E. Men'shov %T Application of Ces\`aro summability methods of negative order to trigonometric Fourier series of summable and square summable functions %J Sbornik. Mathematics %D 1974 %P 497-515 %V 22 %N 4 %I mathdoc %U http://geodesic.mathdoc.fr/item/SM_1974_22_4_a1/ %G en %F SM_1974_22_4_a1