KHOSRAVI, A.; TAKHTEH, F. \(g\)-Bessel Sequences and Operators. Communications in Mathematics and Applications, [S. l.], v. 7, n. 2, p. 139–149, 2016. DOI: 10.26713/cma.v7i2.398. Disponível em: https://www.rgnpublications.com/journals/index.php/cma/article/view/398. Acesso em: 2 may. 2024.