More, K. C., S. S, S. D. Shelke, and J. A. Shepherd. “Process Development and Manufacturing of Tapping Tool Using Friction Welding Technique”. Asian Journal For Convergence In Technology (AJCT) ISSN -2350-1146, Vol. 4, no. 3, Apr. 2019, http://asianssr.org/index.php/ajct/article/view/832.