On Quasi-Chebyshevity Subsets of Unital Banach Algebras. Analysis in Theory and Applications, [S. l.], v. 34, n. 1, p. 92–102, 2018. DOI: 10.4208/ata.2018.v34.n1.7. Disponível em: https://www.global-sci.com/index.php/ata/article/view/8143. Acesso em: 5 dec. 2025.