ET. AL., G. J. . R. . Structures, Operations and their Applications to Topology. Turkish Journal of Computer and Mathematics Education (TURCOMAT), [S. l.], v. 12, n. 2, p. 2199 –, 2021. Disponível em: https://turcomat.org/index.php/turkbilmat/article/view/1908. Acesso em: 5 may. 2024.