SLYUSARCHUK, V. Yu. Conditions of existence of bounded and almost periodic solutions of nonlinear differential equation with perturbations of solutions. Ukrains’kyi Matematychnyi Zhurnal, [S. l.], v. 68, n. 9, p. 1286–1296, 2016. Disponível em: https://umj.imath.kiev.ua/index.php/umj/article/view/1921. Acesso em: 5 dec. 2025.