1.
Vakarchuk SB. Generalized characteristics of smoothness and some extremе problems of the approximation theory of functions in the space $L_2 (R)$. I. Ukr. Mat. Zhurn. [Internet]. 2018Sep.25 [cited 2024Apr.26];70(9):1166-91. Available from: https://umj.imath.kiev.ua/index.php/umj/article/view/1627