B.-S. Trinh, P. Thi Kieu Chinh, and H. Đoan Tram, “Color removal efficiency of rice husk biochar modified with magnetized iron oxides and nano zero valent iron for decolorization of dyeing wastewater”, Science & Technology Development Journal: Science of the Earth & Environment, vol. 3, no. 2, pp. 105-114, Jan. 2020.