Taguchi Approach for Surface Roughness Optimization in Ultrasonic Machining of Titanium and its Alloys. Journal of Manufacturing Engineering, [S. l.], v. 3, n. 4, p. 266–271, 2008. Disponível em: https://www.smenec.org/index.php/1/article/view/652. Acesso em: 20 jul. 2025.