Ismail Akbani, Shubham D. Renge, Swaraj S. Kulkarni, Munesh P. Jagatap, Tejas S. Jaggi. “Optimizing The Casting Development Process In A Foundry Through Six Sigma ”. International Journal of Advanced Science and Technology, Vol. 29, no. 10s, May 2020, pp. 7134 -3, http://sersc.org/journals/index.php/IJAST/article/view/23665.