Mehmood, Faisal, Khizar Hayat, Tahir Mahmood, and Bing-Yuan Cao. “A Multi Criteria Decision Making Method for Cubic Hesitant Fuzzy Sets Based on Einstein Operational Laws”. Italian Journal of Pure and Applied Mathematics 42 (July 30, 2019): 652–669. Accessed October 27, 2026. https://journals.uniurb.it/index.php/ijpam/article/view/7201.