Armijos Briones, F.M. (2022) “Treatment Alternatives to Gingival Hyperpigmentation using Neutrosophic Correlation Coefficients”, Neutrosophic Sets and Systems, 52, pp. 319–325. Available at: https://fs.unm.edu/nss8/index.php/111/article/view/2664 (Accessed: 20 July 2026).