WASET
    Risto Pöykiö and  Jari Hietala and  Hannu Nurmesniemi,  Scots Pine Needles as Bioindicators in Determining the Aerial Distribution Pattern of Sulphur Emissions around Industrial Plants.   journal   = {International Journal of Environmental and Ecological Engineering}, [online]. World Academy of Science, Engineering and Technology.
    August 2010, vol. 44(8). 311 - 314
    [viewed 20 April 2024]. Available from: https://publications.waset.org/pdf/10251.