Nguyen, Van-Thuc, et al. “Evaluation of the Effect of TIG Surface Quenching Process of S45C Steel on the Hardness of Cylindrical Surface Layers by Taguchi Method”. Acta Metallurgica Slovaca, vol. 31, no. 4, Dec. 2025, pp. 225-33, doi:10.36547/ams.31.4.2240.