Hussien Omran, Salman, et al. “Studying the Effect of Alumina on the Mechanical Properties of Aluminum Alloy Prepared from Waste Using Powder Metallurgy”. International Journal of Engineering & Technology, vol. 7, no. 4, Apr. 2019, pp. 5589-93, https://doi.org/10.14419/ijet.v7i4.20652.