%0 Journal Article %A Antoni Zygmund %T Two notes on the summability of infinite series %J Colloquium Mathematicum %D 1947 %P 225-229 %V 1 %N 3 %I mathdoc %U http://geodesic.mathdoc.fr/articles/10.4064/cm-1-3-225-229/ %R 10.4064/cm-1-3-225-229 %G en %F 10_4064_cm_1_3_225_229