Dinh, Van Thanh, Thu Quy Le, Thi Tam Do, Ngoc Pi Vu, and Thi Phuong Thao Tran. “Multi-Objective Optimization of Material Removal Rate and Surface Roughness in Ultrasonic Vibration-Assisted EDM Using NSGA-II, GPR, and AHP”. Engineering, Technology & Applied Science Research 15, no. 4 (August 2, 2025): 24977–24984. Accessed May 30, 2026. https://mail.etasr.com/index.php/ETASR/article/view/11380.