GANTUMUR, B.; PAGMADULAM, M. Study of rare earth elements in coal ash from Khartarvagatai coal deposit. Mongolian Journal of Chemistry, [S. l.], v. 12, p. 35–37, 2014. DOI: 10.5564/mjc.v12i0.168. Disponível em: https://mongoliajol.info/index.php/MJC/article/view/168. Acesso em: 6 jul. 2024.