KULIK, V. L. Construction of Lyapunov Functions in the Theory of Regular Linear Extensions of Dynamical Systems on a Torus. Ukrains’kyi Matematychnyi Zhurnal, [S. l.], v. 67, n. 10, p. 1358–1365, 2015. Disponível em: https://umj.imath.kiev.ua/index.php/umj/article/view/2072. Acesso em: 14 apr. 2025.