DAMAK, H.; HAMMAMI, M. A.; KICHA, A. A converse theorem for practical $h$-stability of time-varying nonlinear systems. New Zealand Journal of Mathematics, [S. l.], v. 50, p. 109–123, 2021. DOI: 10.53733/79. Disponível em: https://nzjmath.org/index.php/NZJMATH/article/view/79. Acesso em: 17 apr. 2024.