%0 Journal Article %T Hardy, G. H., and J. E. Littlewood, Solution of the Cesàro summability problem for power-series and Fourier series %J Mathematische Zeitschrift %D 1924 %P 67-96 %V 19 %I mathdoc %U http://geodesic.mathdoc.fr/item/MZ_1924__19_167766/ %F MZ_1924__19_167766