LI*, H.; LI, Y.; LI, C. Characterization of Humic Acids and Fulvic Acids Derived from Sewage Sludge. Asian Journal of Chemistry, [S. l.], v. 25, n. 18, p. 10087–10091, 2013. DOI: 10.14233/ajchem.2013.15162. Disponível em: https://asianpubs.org/index.php/ajchem/article/view/25_19_14. Acesso em: 1 nov. 2024.