Marius Gheju and  Laura Cocheci,  Hexavalent Chromium Pollution Abatement by use of Scrap Iron.   journal   = {International Journal of Environmental and Ecological Engineering}, [online]. World Academy of Science, Engineering and Technology.
    July 2011, vol. 55(7). 391 - 396
    [viewed 29 January 2020]. Available from: https://publications.waset.org/pdf/11025.