1.
Gupta V, Nowak G. The rate of pointwise approximation of positive linear operators based on q-integer. Ukr. Mat. Zhurn. [Internet]. 2011 Mar. 25 [cited 2025 Dec. 5];63(3):350-6. Available from: https://umj.imath.kiev.ua/index.php/umj/article/view/2721