1.
Rukasov VI, Stepanets OI. Approximation Properties of the de la Vallée-Poussin Method. Ukr. Mat. Zhurn. [Internet]. 2002Aug.25 [cited 2024Nov.22];54(8):1100-25. Available from: https://umj.imath.kiev.ua/index.php/umj/article/view/4150