SVERDAN, M. L. The second Lyapunov method for the investigation of stability of differential equations with Pulse perturbations and Markov coefficients. Ukrains’kyi Matematychnyi Zhurnal, [S. l.], v. 48, n. 6, p. 826–833, 1996. Disponível em: https://umj.imath.kiev.ua/index.php/umj/article/view/5282. Acesso em: 5 dec. 2025.