RONG, A. Construction and Stability of Riesz Bases in Direct Sum Spaces. Communications in Mathematics and Applications, [S. l.], v. 17, n. 3, 2026. DOI: 10.26713/cma.v17i3.3635. Disponível em: https://www.rgnpublications.com/journals/index.php/cma/article/view/3635. Acesso em: 4 oct. 2026.