LEONOV, G. A. Lyapunov functions in the global analysis of chaotic systems. Ukrains’kyi Matematychnyi Zhurnal, [S. l.], v. 70, n. 1, p. 40–62, 2018. Disponível em: https://umj.imath.kiev.ua/index.php/umj/article/view/1541. Acesso em: 5 dec. 2025.