The Pseudo Drazin Inverses in Banach Algebras. Communications in Mathematical Research, [S. l.], v. 37, n. 4, p. 484–495, 2022. DOI: 10.4208/cmr.2021-0013. Disponível em: https://global-sci.com/index.php/cmr/article/view/9060. Acesso em: 5 dec. 2025.