Romanyuk, A. S. (2015) “Estimation of the Entropy Numbers and Kolmogorov Widths for the Nikol’skii–Besov Classes of Periodic Functions of Many Variables”, Ukrains’kyi Matematychnyi Zhurnal, 67(11), pp. 1540-1556. Available at: https://umj.imath.kiev.ua/index.php/umj/article/view/2088 (Accessed: 18April2024).