Stability results by Krasnoselskii-Burton theorem in nonlinear neutral integro-differential equation with variable delay: Stability in neutral integro-differential equations. Nonlinear Studies, [S. l.], v. 24, n. 4, 2017. Disponível em: https://nonlinearstudies.com/index.php/nonlinear/article/view/1432. Acesso em: 20 sep. 2025.