K.Karunanithi, Ibrahim Patel, Ashok Shigli, S. K. V. “Optimal Production Cost Assessment Considering Increase Cost Borders Using Salp Swarm Algorithm”. Design Engineering, Vol. 2021, no. 3, Mar. 2021, pp. 09 -20, http://thedesignengineering.com/index.php/DE/article/view/1194.