BARRENECHEA, A. L.; PEÑA, C. Invariance and normality of projections in the dual of Banach algebras. New Zealand Journal of Mathematics, [S. l.], v. 51, p. 115–118, 2021. DOI: 10.53733/132. Disponível em: https://nzjmath.org/index.php/NZJMATH/article/view/132. Acesso em: 26 apr. 2024.