The Reflexive Selfadjoint Solutions to Some Operator Equations. Communications in Mathematical Research, [S. l.], v. 37, n. 2, p. 236–254, 2021. DOI: 10.4208/cmr.2021-0006. Disponível em: https://www.global-sci.com/index.php/cmr/article/view/9050. Acesso em: 5 dec. 2025.