1. Moduli of continuity in Rn and D ⊂ Rn;Ditzian;Trans. Am. Math. Soc.,1984
2. Inverse theorems for multidimensional Berstein operators;Ditzian;Pacific Jour. of Math.,1986
3. Moduli of Smoothness;Ditzian,1987
4. Remarks on Besov spaces and best polynomial approximation;Ditzian,1988
5. On Bernstein polynomials;Ivanov;Comptes Rendus de l'academie Bulgare des sciences,1982