Alcantara, R. T., D. C. Apodaca, and M. R. D. Guzman. “The Effect of the Presence of Cu2+ and Fe3+ Metal Ions on the Sorption of Mercuric Ion (Hg2+) by Sargassum Cristaefolium”. ASEAN Journal of Chemical Engineering, Vol. 7, no. 2, Dec. 2007, pp. 147-5, https://dev.journal.ugm.ac.id/v3/AJChE/article/view/7689.