1.
Teplins’kyi OY. On the smoothness of conjugation of circle diffeomorphisms with rigid rotations. Ukr. Mat. Zhurn. [Internet]. 2008 Feb. 25 [cited 2025 Dec. 6];60(2):268–282. Available from: https://umj.imath.kiev.ua/index.php/umj/article/view/3155