Vakarchuk, S. B. “On the Estimates of Widths of the Classes of Functions Defined by the Generalized Moduli of Continuity and Majorants in the Weighted Space $L_{2x} (0,1)$”.
Ukrains’kyi Matematychnyi Zhurnal 71, no. 2 (February 25, 2019): 179–189. Accessed April 26, 2025.
https://umj.imath.kiev.ua/index.php/umj/article/view/1430.