Christy V and Mohana K, “Generalized closed sets and pre-closed sets via Bipolar single-valued neutrosophic Topological Spaces”, Neutrosophic Sets Syst., vol. 47, pp. 201–223, Dec. 2021, Accessed: Mar. 17, 2025. [Online]. Available: https://fs.unm.edu/nss8/index.php/111/article/view/4140