Josef Al Jumayel, Maretta Sarkis, & Hasan Jafar. (2023). On Phi-Euler’s Function in Refined Neutrosophic Number Theory and The Solutions of Fermat’s Diophantine Equation. Neutrosophic Sets and Systems, 54, 68-76. https://fs.unm.edu/nss8/index.php/111/article/view/3255