DESULPHURIZATION OF LIGNITIC COALS USING AQUEOUS CUPRIC CHLORIDE. Biological Sciences - PJSIR, [S. l.], v. 46, n. 2, p. 73–77, 2003. Disponível em: http://www.v2.pjsir.org/index.php/biological-sciences/article/view/1597. Acesso em: 25 apr. 2026.