HROD, I. M.; KULIK, V. L. On local perturbations of linear extensions of dynamical systems on a torus. Ukrains’kyi Matematychnyi Zhurnal, [S. l.], v. 52, n. 2, p. 282–287, 2000. Disponível em: https://umj.imath.kiev.ua/index.php/umj/article/view/4417. Acesso em: 5 dec. 2025.