Chinnadurai V, and Sindhu M P. “A Novel Approach: Neutro-Spot Topology and Its Supra Topology With Separation Axioms and Computing the Impact on COVID-19”. Neutrosophic Sets and Systems, vol. 38, Dec. 2020, pp. 189-13, https://fs.unm.edu/nss8/index.php/111/article/view/4180.