Romanyuk AS. Best approximations of the classes $B_{p,\,\theta}^{r}$ of periodic functions of many variables in uniform metric. Ukr. Mat. Zhurn. [Internet]. 2006 Oct. 25 [cited 2025 Apr. 7];58(10):1395–1406. Available from: https://umj.imath.kiev.ua/index.php/umj/article/view/3541