Mohd Al-Hatta, Muhammad Al-Fayyidh, and Mohd Azhar Harimon. “Effect of Side Groove Shapes on Shear Lips Formation of Aluminium Alloy 6061 Using Finite Element Analysis”. Journal of Advanced Mechanical Engineering Applications, vol. 3, no. 2, Dec. 2022, pp. 29-36, https://publisher.uthm.edu.my/ojs/index.php/jamea/article/view/12114.