Yanchenko, S. Y. (2015). Approximation of Functions from the Isotropic Nikol’skii–Besov Classes in the Uniform and Integral Metrics. Ukrains’kyi Matematychnyi Zhurnal, 67(10), 1423-1433. Retrieved from https://umj.imath.kiev.ua/index.php/umj/article/view/2077