1. A note on approximation by Bernstein polynomials;Bajsanski;Bull. Amer. Math. Soc.,1964
2. A theorem converse to a theorem of Voronovskaja type;Amel'kovič;Teor. Funkčiǐ, Funkćional. Anal. i Priložen,1966
3. Operatoren vom Bernsteinschen Typ;Mühlbach;J. Approx. Theory,1970
4. Saturation of positive operators;Lorentz;J. Approx. Theory,1972
5. D. Cárdenas-Morales and P. Garrancho, Local saturation of conservative operators, Acta Math. Hung. (to appear).