Discussion on the solutions to nonlinear singular systems with delay via Lyapunov–Krasovski? approach. Nonlinear Studies, [S. l.], v. 31, n. 4, p. 1053–1066, 2024. Disponível em: https://nonlinearstudies.com/index.php/nonlinear/article/view/3659. Acesso em: 20 sep. 2025.