SAEED, M. Desulfurization of coal by solvent leaching method. Journal of the Pakistan Institute of Chemical Engineers, [S. l.], v. 43, n. 2, p. 119–125, 2015. Disponível em: http://piche.org.pk/journal/index.php/jpiche/article/view/223. Acesso em: 24 apr. 2024.