Yanchenko, S.Ya. “Approximation of the Nikol’skii-Besov Functional Classes by Entire Functions of a Special Form”. Carpathian Mathematical Publications 12, no. 1 (June 12, 2020): 148–156. Accessed February 2, 2026. https://journals.pnu.edu.ua/index.php/cmp/article/view/3895.