Wang, Z., S. Zheng, S. Ma, J. Ding, and X. Wang. “RECOVERY OF SODIUM FROM ALUMINA-EXTRACTED FLY ASH USING CONCENTRATED SODIUM CARBONATE SOLUTION”. Journal of Mining and Metallurgy, Section B: Metallurgy, Vol. 54, no. 2, Sept. 2018, p. 225, https://aseestant.ceon.rs/index.php/jmm/article/view/16791.