FEDOROV, V.; KOSTIĆ, M. On a class of abstract degenerate multi-term fractional differential equations in locally convex spaces. Eurasian Mathematical Journal, [S. l.], v. 9, n. 3, 2018. Disponível em: https://emj.enu.kz/index.php/main/article/view/123. Acesso em: 9 oct. 2025.