Liu, Aimin, Zhongning Shi, Kaiyu Xie, Xianwei Hu, Bingliang Gao, and Zhaowen Wang. 2017. “Extraction of Al–Si Master Alloy and Alumina from Coal Fly Ash”. Journal of Mining and Metallurgy, Section B: Metallurgy 53 (2), 155-62. https://aseestant.ceon.rs/index.php/jmm/article/view/11152.