%0 Journal Article %A G. Freud %A S. Knapowski %T On linear processes of approximation (II) %J Studia Mathematica %D 1964 %P 251-263 %V 25 %N 2 %I mathdoc %U http://geodesic.mathdoc.fr/articles/10.4064/sm-25-2-251-263/ %R 10.4064/sm-25-2-251-263 %G en %F 10_4064_sm_25_2_251_263