TKACHENKO, V. I. On linear homogeneous almost periodic systems that satisfy the Favard condition. Ukrains’kyi Matematychnyi Zhurnal, [S. l.], v. 50, n. 3, p. 409–413, 1998. Disponível em: https://umj.imath.kiev.ua/index.php/umj/article/view/4940. Acesso em: 5 dec. 2025.