The Spectrum of a Certain Large Block Matrix. European Journal of Pure and Applied Mathematics, Maryland, USA, v. 17, n. 4, p. 2550–2561, 2024. DOI: 10.29020/nybg.ejpam.v17i4.5317. Disponível em: https://www.ejpam.com/index.php/ejpam/article/view/5317. Acesso em: 7 nov. 2024.