Gonska, H. and Păltănea, R. (2010) “Quantitative convergence theorems for a class of Bernstein–Durrmeyer operators preserving linear functions”, Ukrains’kyi Matematychnyi Zhurnal, 62(7), pp. 913–922. Available at: https://umj.imath.kiev.ua/index.php/umj/article/view/2924 (Accessed: 17April2024).