Mikko Mäkelä and  Risto Pöykiö and  Gary Watkins and  Hannu Nurmesniemi and  Olli Dahl,  Application of a Modified BCR Approach to Investigate the Mobility and Availability of Trace Elements (As, Ba, Cd, Co, Cr, Cu, Mo,Ni, Pb, Zn, and Hg) from a Solid Residue Matrix Designed for Soil Amendment.   journal   = {International Journal of Environmental and Ecological Engineering}, [online]. World Academy of Science, Engineering and Technology.
    July 2011, vol. 55(7). 397 - 402
    [viewed 17 October 2019]. Available from: https://publications.waset.org/pdf/13518.