M.Jawahar, Ch.Sridhar Reddy, Ch.Srinivas. “Multi-Quality Characteristics Optimization of NPMEDM of Nimonic 90 by Using Data Envelopment Analysis Based Ranking Technique”. Design Engineering (November 22, 2021): 14541 - 14552. Accessed May 2, 2024. http://www.thedesignengineering.com/index.php/DE/article/view/6582.