A. Praveen Prakash, and M. GeethaLakshmi. “Sub-Trident Rankingusing Fuzzy Numbers”. International Journal of Mathematics And its Applications 4, no. 2 - A (May 1, 2016): 143–150. Accessed March 12, 2026. http://ijmaa.in/index.php/ijmaa/article/view/1017.