Dutta, Dhiman, and Mausumi Sen. “Type-2 Fuzzy Equivalence Relation on A Groupoid under Balanced and Semibalanced Maps”. Journal of Informatics and Mathematical Sciences 10, no. 1-2 (August 9, 2018): 133–151. Accessed June 20, 2025. http://www.journals.rgnpublications.com/index.php/jims/article/view/535.