BEL’SKII, D. V.; PELYUKH, G. P. On the behavior of solutions of linear functional differential equations with constant coefficients and linearly transformed argument in neighborhoods of singular points. Ukrains’kyi Matematychnyi Zhurnal, [S. l.], v. 57, n. 12, p. 1668–1676, 2005. Disponível em: https://umj.imath.kiev.ua/index.php/umj/article/view/3717. Acesso em: 14 apr. 2025.