Thi To Yen Nguyen, Phung Anh Nguyen, Thi Thuy Van Nguyen, Tri Nguyen, and Ky Phuong Ha Huynh. “Adsorption of Cr(VI) by Material Synthesized from Red Mud and Rice Husk Ash”. Vietnam Journal of Science, Technology and Engineering, vol. 60, no. 4, Dec. 2018, pp. 3-7, doi:10.31276/VJSTE.60(4).03-07.