Bhutani, B., M. Khera, R. Rana, S. Sharma, D. ., and P. Shakkarwal. “Design and Fabrication of Progressive Tool for Sheet Metal Component”. Journal of Advanced Research in Mechanical Engineering and Technology, vol. 3, no. 4, Jan. 2019, pp. 1-6, https://adrjournalshouse.com/index.php/mechanical-engg-technology/article/view/254.