1. Local approximation by a variant of Bernstein–Durrmeyer operators;Abel;Nonlinear Anal.: Theor. Meth. Appl.,2008
2. G.A. Anastassiou, S.G. Gal, Approximation by complex Bernstein–Durrmeyer polynomials in compact disks, Mediterr. J. Math. doi:10.1007/s00009-010-0036-1.
3. W.Z. Chen, On the modified Bernstein–Durrmeyer operators, in: Report of the Fifth Chinese Conference on Approximation Theory, Zhen Zhou, China, 1987.
4. Exact orders in simultaneous approximation by complex Bernstein polynomials;Gal;J. Concr. Appl. Math.,2009
5. Shape Preserving Approximation by Real and Complex Polynomials;Gal,2008