Jamiyansuren, Bayardulam, Baasandorj Myagmarsuren, Narangua Khongorzul, and Battsengel Baatar. “Acid Leaching of Rare Earth Elements from Coal Ash Obtained from a Mongolian Surface Mine”. Mongolian Journal of Chemistry 26, no. 54 (August 28, 2025): 1–6. Accessed January 26, 2026. https://www.mongoliajol.info/index.php/MJC/article/view/3932.