MARTÍNEZ, Gustavo A.; TRAINA, Samuel J.; LOGAN, Terry J. Evaluation of proton and europium (III) binding reactions in a sewage sludge humic acid. The Journal of Agriculture of the University of Puerto Rico, [S. l.], v. 82, n. 3-4, p. 121–140, 1998. DOI: 10.46429/jaupr.v82i3-4.4071. Disponível em: https://revistas.upr.edu/index.php/jaupr/article/view/4071. Acesso em: 28 mar. 2024.