TEPLINS’KYI, O. Yu. Examples of $C^1$-smoothly conjugate diffeomorphisms of the circle with break that are not $C^{1+γ}$ -smoothly conjugate. Ukrains’kyi Matematychnyi Zhurnal, [S. l.], v. 62, n. 8, p. 1092–1105, 2010. Disponível em: https://umj.imath.kiev.ua/index.php/umj/article/view/2939. Acesso em: 5 dec. 2025.