M.Venkatachalapathy, P.Nagarajan, A.Jayaraja. “An Optimal Solution for Solving Unbalanced Assignment Problems Using Triangular Fuzzy Numbers”. International Journal of Advanced Science and Technology, Vol. 29, no. 06, May 2020, pp. 4107 -14, https://sersc.org/journals/index.php/IJAST/article/view/16416.