Romanyuk AS. Estimation of the Entropy Numbers and Kolmogorov Widths for the Nikol’skii–Besov Classes of Periodic Functions of Many Variables. Ukr. Mat. Zhurn. [Internet]. 2015Nov.25 [cited 2024Nov.23];67(11):1540-56. Available from: https://umj.imath.kiev.ua/index.php/umj/article/view/2088