Gad, H.M.H., H.A. Omar, M. Aziz, M.R. Hassan, and M.H. Khalil. “Treatment of Rice Husk Ash to Improve Adsorption Capacity of Cobalt from Aqueous Solution”. Asian Journal of Chemistry 28, no. 2 (November 3, 2015): 385–394. Accessed July 5, 2024. https://asianpubs.org/index.php/ajchem/article/view/28_2_34.