Khamboonrueang, D., P. Kamkird, and N. Boonsong. “Feasibility Study on The Use of Reduced Graphene Oxide-Iron Oxide Composite for Removal of Hexavalent Chromium in Wastewater”. Rajamangala University of Technology Tawan-Ok Research Journal, vol. 16, no. 2, Dec. 2023, pp. 47-57, https://li01.tci-thaijo.org/index.php/researchjournal2rmutto/article/view/260100.