Stehle, T., R. Eisseler, K. Drewle, S. Weiland, and J. Twiefel. “Investigation of Process Forces of Ultrasonically Assisted Scratch Tests”. International Conference on Stone and Concrete Machining (ICSCM) 3 (November 25, 2015): 137–145. Accessed April 20, 2024. https://icscm.ub.rub.de/index.php/ICSCM/article/view/396.