SLYUSARCHUK, V. Yu. A Criterion for the Existence of Almost Periodic Solutions of Nonlinear Differential Equations with Impulsive Perturbation. Ukrains’kyi Matematychnyi Zhurnal, [S. l.], v. 67, n. 6, p. 838–848, 2015. Disponível em: https://umj.imath.kiev.ua/index.php/umj/article/view/2026. Acesso em: 5 dec. 2025.