Pozharska K, Romanyuk A, Yanchenko S. Best approximations for classes of periodic functions of many variables with bounded dominating mixed derivative. Ukr. Mat. Zhurn. [Internet]. 2024 Aug. 4 [cited 2025 Apr. 13];76(7):1007-23. Available from: https://umj.imath.kiev.ua/index.php/umj/article/view/8307