Mahsa Tavakoli and  Seyed Mohammad Hojjati and  Yahya Kooch,  Lead and Cadmium Spatial Pattern and Risk Assessment around Coal Mine in Hyrcanian Forest, North Iran.   journal   = {International Journal of Environmental and Ecological Engineering}, [online]. World Academy of Science, Engineering and Technology.
    March 2019, vol. 148(4). 199 - 202
    [viewed 14 October 2019]. Available from: https://publications.waset.org/pdf/10010213.