SUMAN DAS; RAKHAL DAS; SURAPATI PRAMANIK. Topology on Ultra Neutrosophic Set. Neutrosophic Sets and Systems, [S. l.], v. 47, p. 93–104, 2021. Disponível em: https://fs.unm.edu/nss8/index.php/111/article/view/4126.. Acesso em: 4 jun. 2025.