General Upper Bounds for the Numerical Radii of Hilbert Space Operators. The Eurasia Proceedings of Science, Technology, Engineering and Mathematics, [S. l.], v. 28, p. 375–381, 2024. DOI: 10.55549/epstem.1523566. Disponível em: https://www.epstem.net/index.php/epstem/article/view/894. Acesso em: 24 mar. 2026.