DENYSENKO, N. L.; SAMOILENKO, A. M. On solutions of linear functional differential equations with linearly transformed argument on a semiaxis. Ukrains’kyi Matematychnyi Zhurnal, [S. l.], v. 59, n. 4, p. 501–513, 2007. Disponível em: https://umj.imath.kiev.ua/index.php/umj/article/view/3324. Acesso em: 5 dec. 2025.