Hahn-Banach theorem-based analytic approaches for the abstract Cauchy-Euler differential equation. Gulf Journal of Mathematics, [S. l.], v. 18, n. 1, p. 118–123, 2024. DOI: 10.56947/gjom.v18i1.2270. Disponível em: https://gjom.org/index.php/gjom/article/view/2270. Acesso em: 26 aug. 2026.