YANG, Junjian. A note on unitarily invariant norm inequalities for accretive-dissipative operator matrices. Italian Journal of Pure and Applied Mathematics, [S. l.], v. 43, p. 206–212, 2020. Disponível em: https://journals.uniurb.it/index.php/ijpam/article/view/7355. Acesso em: 6 nov. 2026.