Novikov OA, Rukasov VI. Approximation of the classes $C_{β}^{ψ} H_{ω}$ by generalized de la Valiée-Poussin sums. Ukr. Mat. Zhurn. [Internet]. 1997Apr.25 [cited 2024May19];49(4):606-10. Available from: https://umj.imath.kiev.ua/index.php/umj/article/view/5039