Gupta, Vijay. “Rate of Convergence for Szász-Bézier Operators”. Ukrains’kyi Matematychnyi Zhurnal 57, no. 12 (December 25, 2005): 1619–1624. Accessed May 3, 2024. https://umj.imath.kiev.ua/index.php/umj/article/view/3713.