WASET
    A. Argiri and  A. Molla and  Tzouvalekas and  E. Skoufogianni and  N. Danalatos,  A Study of Soil Heavy Metal Pollution in the Manganese Mining in Drama, Greece.   journal   = {International Journal of Geological and Environmental Engineering}, [online]. World Academy of Science, Engineering and Technology.
    March 2021, vol. 172(4). 147 - 150
    [viewed 24 April 2024]. Available from: https://publications.waset.org/pdf/10011996.