Van Thuan Tran, Van Thinh Pham, Thi Phuong Quynh Bui, Duy Trinh Nguyen, and Long Giang Bach. “Optimization of Congo Red Removal by Adsorption onto NiFe2O4/GO Nanocomposite”. Vietnam Journal of Science, Technology and Engineering, vol. 59, no. 3, Sept. 2017, pp. 3-6, doi:10.31276/VJSTE.59(3).03.