YANCHENKO, S. Ya. Approximation of Functions from the Isotropic Nikol’skii–Besov Classes in the Uniform and Integral Metrics. Ukrains’kyi Matematychnyi Zhurnal, [S. l.], v. 67, n. 10, p. 1423–1433, 2015. Disponível em: https://umj.imath.kiev.ua/index.php/umj/article/view/2077. Acesso em: 14 apr. 2025.