%0 Journal Article %A J. Meder %T On the summability almost everywhere of orthonormal series by the method of Euler-Knopp %J Annales Polonici Mathematici %D 1958 %P 135-148 %V 5 %N 2 %I mathdoc %U http://geodesic.mathdoc.fr/articles/10.4064/ap-5-2-135-148/ %R 10.4064/ap-5-2-135-148 %G en %F 10_4064_ap_5_2_135_148