On Bernstein type rational functions of two variables Çiğdem Atakut; Nurhayat İspir — 2004 Mathematica Slovaca
On the Bézier variant of Srivastava-Gupta operators. Ispir, Nurhayat; Yuksel, Ismet — 2005 Applied Mathematics E-Notes [electronic only]
On simultaneous approximation for some modified Bernstein-type operators. Gupta, Vijay; Ispir, Nurhayat — 2004 International Journal of Mathematics and Mathematical Sciences