M Amin, Sri Yulis. “Porosity Scale Evaluation of Shielded Metal Arc Welding (SMAW) Specimen Using Dye Penetrant Testing ”. Journal of Advanced Mechanical Engineering Applications, vol. 5, no. 2, Dec. 2024, pp. 1-6, https://penerbit.uthm.edu.my/ojs/index.php/jamea/article/view/13806.