S. N. Sulaiman and R. Ahmad, “Effect of Erbium on Microstructure and Hardness Properties of Aluminium LM30 Alloy”, rpmme, vol. 4, no. 2, pp. 379–383, Dec. 2023, Accessed: May 14, 2024. [Online]. Available: https://penerbit.uthm.edu.my/periodicals/index.php/rpmme/article/view/9286