Sayuti, M., M. Alhajji, and S. Sulaiman. “Mechanical Properties and Morphological Analysis of Copper Filled Aluminum Alloy Hybrid Matrix Composite”. Journal of Engineering and Technological Sciences, vol. 52, no. 6, Nov. 2020, pp. 855-66, doi:10.5614/j.eng.technol.sci.2020.52.6.6.