1.
A. A. Salama, Florentin Smarandache, Valeri Kromov. Neutrosophic Closed Set and Neutrosophic Continuous Functions . Neutrosophic Sets Syst. 2014;4:4-8. Accessed May 17, 2026. https://fs.unm.edu/nss8/index.php/111/article/view/3910