G Revathy, M.Rajeshwari, ShanmugaRathinam,. “The Bipolar Fuzzy Set And Knn Intergumentary System Analytical Study”. Design Engineering (October 22, 2021): 6291-6297. Accessed April 29, 2024. http://www.thedesignengineering.com/index.php/DE/article/view/5594.