TEPLINS’KYI, O. Yu. On the smoothness of conjugation of circle diffeomorphisms with rigid rotations. Ukrains’kyi Matematychnyi Zhurnal, [S. l.], v. 60, n. 2, p. 268–282, 2008. Disponível em: https://umj.imath.kiev.ua/index.php/umj/article/view/3155. Acesso em: 5 dec. 2025.