Some Results on Topical Functions and Upward Sets. Analysis in Theory and Applications, [S. l.], v. 27, n. 4, p. 301–308, 2011. DOI: 10.1007/s10496-011-0301-6. Disponível em: https://global-sci.com/index.php/ata/article/view/7919. Acesso em: 6 dec. 2025.