V. Grachev, Mikhail, and . . “Comparison of Technological Methods for Small Diameter Hole Perforation in Titanium Alloys”. International Journal of Engineering and Technology 7, no. 3.19 (September 7, 2018): 105–107. Accessed May 24, 2025. https://mail.sciencepubco.com/index.php/IJET/article/view/16995.