WU, Xuesha. INEQUALITIES OF UNITARILY INVARIANT NORMS FOR MATRICES. Italian Journal of Pure and Applied Mathematics, [S. l.], v. 40, p. 28–33, 2018. Disponível em: https://journals.uniurb.it/index.php/ijpam/article/view/7062. Acesso em: 17 oct. 2026.