Nguyen, H., K. Dang, and D. Phan. “Synthesis of Fe3O4/Graphene Oxide Nanocomposite for the Treatment of Heavy Metals in the Contaminated Wastewater”. Science and Technology Development Journal, Vol. 18, no. 4, Dec. 2015, pp. 212-20, doi:https://doi.org/10.32508/stdj.v18i4.951.