TYRYGIN, I. Ya. Refined estimates for the ε-entropy of the classes $KH_0^α$. Ukrains’kyi Matematychnyi Zhurnal, [S. l.], v. 46, n. 6, p. 760–764, 1994. Disponível em: https://umj.imath.kiev.ua/index.php/umj/article/view/5704. Acesso em: 5 dec. 2025.