ROMANYUK , A. S.; YANCHENKO, S. Ya. Kolmogorov widths of the Nikol’skii – Besov classes of periodic functions of many variables in the space of quasi-continuous functions. Ukrains’kyi Matematychnyi Zhurnal, [S. l.], v. 74, n. 2, p. 220–232, 2022. DOI: 10.37863/umzh.v74i2.6932. Disponível em: https://umj.imath.kiev.ua/index.php/umj/article/view/6932. Acesso em: 5 dec. 2025.