VAKARCHUK, S.; ZABUTNA, V.; VAKARCHUK, M. 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, [S. l.], v. 77, n. 10, p. 599–628, 2025. DOI: 10.3842/umzh.v77i10.9225. Disponível em: https://umj.imath.kiev.ua/index.php/umj/article/view/9225. Acesso em: 5 dec. 2025.