I. Y. Tyrygin, “Refined estimates for the ε-entropy of the classes $KH_0^α$”, Ukr. Mat. Zhurn., vol. 46, no. 6, pp. 760–764, Jun. 1994, Accessed: Feb. 17, 2026. [Online]. Available: https://umj.imath.kiev.ua/index.php/umj/article/view/5704