“Estimates for Approximative Characteristics of Classes $S^r_{p,\theta}B(\mathbb{R}^d)$ of Functions in the Uniform Metric”. Transactions of Institute of Mathematics, the NAS of Ukraine, vol. 10, no. 1, July 2013, pp. 328-40, https://trim.imath.kiev.ua/index.php/trim/article/view/96.