AHMED B. AL-NAFEE; A. A. SALAMA; SMARANDACHE, Florentin; A. A. SALAMA. New Types of Neutrosophic Crisp Closed Sets. Neutrosophic Sets and Systems, [S. l.], v. 36, p. 175–183, 2020. Disponível em: https://fs.unm.edu/nss8/index.php/111/article/view/781.. Acesso em: 18 jul. 2024.