Pozharska K, Romanyuk A, Yanchenko S. Estimates of the characteristics of nonlinear approximation of classes of periodic functions of many variables. Carpathian Math. Publ. [Internet]. 2025 Aug. 16 [cited 2026 Apr. 15];17(2):447-60. Available from: https://journals.pnu.edu.ua/index.php/cmp/article/view/9464