M. Venkatachalapathy, M. Ayyappan, S. Revathi, R. Neelambari. “Optimum Job Allocation for Design of Machines Using Row Minimum Allocation Method of Assignment Problems under Crisp and Triangular Fuzzy Numbers”. Design Engineering, July 2021, pp. 2657 -65, http://www.thedesignengineering.com/index.php/DE/article/view/2780.