[1]
V. L. Velikin and Y. V. Velikina, “Widths of sets of functions of discrete variable”, Ukr. Mat. Zhurn., vol. 48, no. 10, pp. 1311–1320, Oct. 1996, Accessed: Feb. 17, 2026. [Online]. Available: https://umj.imath.kiev.ua/index.php/umj/article/view/5216