Libyawati, W., G. Kiswanto, A. S. Saragih, and T. J. Ko. “Numerical Modeling and Experimental Evaluation of Machining Parameters for 2-Dimensions Ultrasonic-Assisted Micro-Milling at Low and High-Speed Machining”. EUREKA: Physics and Engineering, no. 3, May 2022, pp. 57-68, doi:10.21303/2461-4262.2022.002440.