Hoang Nghia, D.; Duong Xuan, B.; Bui Kim, H.; Nguyen Kim, H.; Do Manh, T.; Ngo Viet, H.; Truong Khanh, N. Research on Modeling and Optimization for Surface Roughness of Al6061 Spherical in Ultra-Precision Turning Based on Neural Network and Bee Colony Optimization Algorithm. SSAD 2025, 35, 034-044.