Alguacil, F. J., and M. A. Villegas. “Liquid Membranes and the Treatment of Metal-Bearing Wastewaters”. Revista de Metalurgia 38, no. 1 (February 28, 2002): 45–55. Accessed April 26, 2024. https://revistademetalurgia.revistas.csic.es/index.php/revistademetalurgia/article/view/383.