VakarchukS. 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 November 21, 2024. https://umj.imath.kiev.ua/index.php/umj/article/view/1430.