TY  - JOUR
AU  - G. Freud
AU  - S. Knapowski
TI  - On linear processes of approximation (I)
JO  - Studia Mathematica
PY  - 1963
SP  - 105
EP  - 112
VL  - 23
IS  - 2
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/articles/10.4064/sm-23-2-105-112/
DO  - 10.4064/sm-23-2-105-112
LA  - en
ID  - 10_4064_sm_23_2_105_112
ER  -