Saeed, Muhammad, Muhammad Rayees Ahmad, and Atiqe Ur Rahman. “Refined Pythagorean Fuzzy Sets: Properties, Set-Theoretic Operations and Axiomatic Results”. Journal of Computational and Cognitive Engineering 2, no. 1 (January 25, 2022): 10–16. Accessed April 26, 2024. https://ojs.bonviewpress.com/index.php/JCCE/article/view/146.