Al-sonosi Abohusina, Mohamed Aljadi, Khaled Marwan, and Ali Elhatmi. “Optimization Process Parameters of Submerged Arc Welding Using Factorial Design Approach”. Surman Journal of Science and Technology, vol. 3, no. 1, Dec. 2021, pp. 059-71, https://sjst.scst.edu.ly/index.php/sjst/article/view/30.