Diagonal perturbation of regular extensions on dynamical systems on a torus. Neliniini Kolyvannya, [S. l.], v. 3, n. 1, p. 36–43, 2000. Disponível em: https://twinhead.imath.kiev.ua/index.php/nosc/article/view/93. Acesso em: 22 jan. 2026.