ANITHA S; MOHANA K; SMARANDACHE, Florentin. On NGSR Closed Sets in Neutrosophic Topological Spaces. Neutrosophic Sets and Systems, [S. l.], v. 28, p. 171–178, 2019. Disponível em: https://fs.unm.edu/nss8/index.php/111/article/view/243.. Acesso em: 18 may. 2025.