Romanyuk A. S., and YanchenkoS. Ya. 2022. “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 74 (2), 220 -32. https://doi.org/10.37863/umzh.v74i2.6932.