%0 Journal Article %A S. Kaczmarz %T Notes on orthogonal series I %J Studia Mathematica %D 1934 %P 24-28 %V 5 %N 1 %I mathdoc %U http://geodesic.mathdoc.fr/articles/10.4064/sm-5-1-24-28/ %R 10.4064/sm-5-1-24-28 %G en %F 10_4064_sm_5_1_24_28