Nakpradit, T., and B. Poopat. “Investigation of Diffusible Hydrogen Content and Microstructure Examination of Underwater Welding”. Applied Science and Engineering Progress 3, no. 3 (September 19, 2013): 45–51. accessed December 9, 2025. https://ph02.tci-thaijo.org/index.php/ijast/article/view/67400.