1. An example of a sequence of linear positive operators in the space of continuous functions;Baskakov;Dokl. Akad. Nauk. SSSR,1957
2. M. Becker, Inverse theorems for Favard operators in polynomial weight spaces, Comment Math. Prace Mat., in press.
3. Saturation for Favard operators in weighted function spaces;Becker;Studia Math.,1976
4. Démonstration du théorème de Weierstrass fondée sur le calul des probabilités;Bernstein;Commun. Soc. Math. Kharkow 2,1912