Rahman, H. H. A., A. H. Moustafa, M. A. Z. Mostafa, and E. A. Wahed. “Removal of Carcinogenic Hexavalent Chromium by Reduction With Iron in Presence of Accelerator Non Toxic Organic Compounds (Chalcone)”. JOURNAL OF ADVANCES IN CHEMISTRY, vol. 11, no. 4, June 2015, pp. 3463-74, doi:10.24297/jac.v11i4.2205.