Tongcumpou, C., N. Kongmak, and C. Sutthirat. “Suppression of Pyrite Oxidation With Iron-Phosphate Coating: Technique for Prevention of Acid Mine Drainage”. Applied Environmental Research, vol. 32, no. 1, June 2013, pp. 81-91, https://ph01.tci-thaijo.org/index.php/aer/article/view/9703.