Vakarchuk, S., V. Zabutna, and M. Vakarchuk. 2025. “Exact Values of Widths for the Classes of Functions Defined by the Averaged Smoothness Characteristics and Majorants in the Space $L_2$”. Ukrains’kyi Matematychnyi Zhurnal 77 (10): 599–628. https://doi.org/10.3842/umzh.v77i10.9225.