1.
Rukasov VI, Silin ES. Approximation of Continuous Functions by de La Vallee-Poussin Operators. Ukr. Mat. Zhurn. [Internet]. 2005Feb.25 [cited 2024Jun.21];57(2):230–238. Available from: https://umj.imath.kiev.ua/index.php/umj/article/view/3590