%0 Journal Article %A G. Freud %A S. Knapowski %T On linear processes of approximation (III) %J Studia Mathematica %D 1964 %P 373-384 %V 25 %N 3 %I mathdoc %U http://geodesic.mathdoc.fr/articles/10.4064/sm-25-3-373-384/ %R 10.4064/sm-25-3-373-384 %G en %F 10_4064_sm_25_3_373_384