WASET
    Katarzyna StrzaƂa-Osuch,  Assessment of Pollution Reduction.   journal   = {International Journal of Environmental and Ecological Engineering}, [online]. World Academy of Science, Engineering and Technology.
    May 2008, vol. 17(5). 37 - 42
    [viewed 24 April 2024]. Available from: https://publications.waset.org/pdf/9536.