Kazeem, A., A. J. Ajala, N. A. Badarulzaman, and W. F. F. Wan Ali. “Effect of Imperfections on Conductivity and Hardness of High-Zn X7xxx Cast Al-Alloys Produced from Recycled Beverage Can”. International Journal of Integrated Engineering, Vol. 12, no. 1, Feb. 2020, pp. 188-94, https://publisher.uthm.edu.my/ojs/index.php/ijie/article/view/4349.