T. V. Do and N. A. V. Le, “Development of a Multi-Objective Optimization Model for the Hard Turning of SKD11 Steel with Nanofluid-Al₂O₃ Minimum Quantity Lubrication Using RSM and PSO”, Eng. Technol. Appl. Sci. Res., vol. 15, no. 4, pp. 24897–24903, Aug. 2025.