DEMENCHUK, A. K. On Partially Irregular Almost Periodic Solutions of Weakly Nonlinear Ordinary Differential Systems. Ukrains’kyi Matematychnyi Zhurnal, [S. l.], v. 57, n. 8, p. 1123 – 1130, 2005. Disponível em: https://umj.imath.kiev.ua/index.php/umj/article/view/3670. Acesso em: 11 apr. 2025.