S. ASHAEA, G.; YOUSIF, Y. Y. Filter Bases and j-ω-Perfect Mappings. Ibn AL-Haitham Journal For Pure and Applied Sciences, Baghdad, Iraq., v. 32, n. 3, p. 165–177, 2019. DOI: 10.30526/32.3.2289. Disponível em: https://jih.uobaghdad.edu.iq/index.php/j/article/view/2289. Acesso em: 28 mar. 2025.