Rukasov V. I. (1992) “Approximation of the functions preset on the real axis by the Valle Pussen operators ”, Ukrains’kyi Matematychnyi Zhurnal, 44(5), pp. 682-691. Available at: https://umj.imath.kiev.ua/index.php/umj/article/view/7965 (Accessed: 6October2024).