TyryginI. Y. (1994) “Refined estimates for the ε-entropy of the classes $KH_0^α$”, Ukrains’kyi Matematychnyi Zhurnal, 46(6), pp. 760–764. Available at: https://umj.imath.kiev.ua/index.php/umj/article/view/5704 (Accessed: 24November2024).