SLYUSARCHUK, V. E. Necessary and sufficient conditions for the oscillation of solutions of nonlinear differential equations with pulse influence in a banach space. Ukrains’kyi Matematychnyi Zhurnal, [S. l.], v. 51, n. 1, p. 98–109, 1999. Disponível em: https://umj.imath.kiev.ua/index.php/umj/article/view/4586. Acesso em: 5 dec. 2025.