ESCASSUT, A. Idempotents in an ultrametric Banach algebra. CUBO, A Mathematical Journal, [S. l.], v. 23, n. 1, p. 161–170, 2021. DOI: 10.4067/S0719-06462021000100161. Disponível em: https://cubo.ufro.cl/ojs/index.php/cubo/article/view/2607. Acesso em: 19 may. 2024.