BAINOV, D. D.; DIMITROVA, M. B. Sufficient Conditions for Oscillation of Solutions of Nonlinear Impulsive Differential Equations With a Retarded Argument. The Journal of the Indian Mathematical Society, [S. l.], v. 66, n. 1-4, p. 49–59, 1999. Disponível em: https://informaticsjournals.co.in/index.php/jims/article/view/21931. Acesso em: 7 nov. 2024.