OKWANY, I.O; OKELO, N.B; ONGATI, O. Numerical radii inequalities for derivations induced by orthogonal projections. International Journal of Modern Computation, Information and Communication Technology, [S. l.], v. 4, n. 3 & 4, p. 7–12, 2021. DOI: 10.65000/cj7p9549. Disponível em: https://gjpublications.com/index.php/IJMCICT/article/view/62. Acesso em: 23 oct. 2025.