V. Grachev, Mikhail, and . . “Comparison of Technological Methods for Small Diameter Hole Perforation in Titanium Alloys”. International Journal of Engineering & Technology 7, no. 3.19 (September 7, 2018): 105–107. Accessed May 2, 2024. https://sciencepubco.com/index.php/ijet/article/view/16995.