Han, Le Duy. “Research of Welding P91 Steel With Shielded Metal Arc Welding (SMAW) and Gas Tungsten Arc Welding (GTAW) Processes”.
Old Journal
, no. 117 (March 15, 2017): 49–53. Accessed August 2, 2025. https://jst.vn/index.php/old/article/view/454.