Abed Al-Rahman M. Malkawi, and Ayat M. Rabaiah. “ MR-Metric Spaces: Theory and Applications in Fractional Calculus and Fixed-Point Theorems”. Neutrosophic Sets and Systems 91 (December 1, 2025): 685–703. Accessed May 29, 2026. https://fs.unm.edu/nss8/index.php/111/article/view/7032.