E. KHALID, Huda; SMARANDACHE, Florentin; K. ESSA, Ahmed. A Neutrosophic Binomial Factorial Theorem with their Refrains. Neutrosophic Sets and Systems, [S. l.], v. 14, p. 7–11, 2016. Disponível em: https://fs.unm.edu/nss8/index.php/111/article/view/556.. Acesso em: 17 apr. 2025.