TYRYGIN, I.Ya. $\varepsilon$-entropy approach to the problem of the compression of information. Ukrains’kyi Matematychnyi Zhurnal, [S. l.], v. 44, n. 11, p. 1598–1604, 1992. Disponível em: https://umj.imath.kiev.ua/index.php/umj/article/view/8263. Acesso em: 11 apr. 2025.