Anwar, Sajid, et al. “Evaluation of Chromium (III) Biosorption Efficiency of Rice Husk and Leftover Tea Waste”.
Asian-Australasian Journal of Bioscience and Biotechnology
, vol. 2, no. 2, Aug. 2017, pp. 193-8, doi:10.3329/aajbb.v2i2.64385.