ET. AL., V. S. Characterizations of Nnce-open and Nnce-closed Functions. Turkish Journal of Computer and Mathematics Education (TURCOMAT), [S. l.], v. 12, n. 1S, p. 351–356, 2021. Disponível em: https://turcomat.org/index.php/turkbilmat/article/view/1849. Acesso em: 2 may. 2024.