ERGÖREN, H. Impulsive functional differential equations of fractional order with variable moments. Ukrains’kyi Matematychnyi Zhurnal, [S. l.], v. 68, n. 9, p. 1169–1179, 2016. Disponível em: https://umj.imath.kiev.ua/index.php/umj/article/view/1912. Acesso em: 17 apr. 2025.