WASET
    A. Szabó Nagy and  J. Szabó and  I. Vass,  An Assessment of Water and Sediment Quality of the Danube River: Polycyclic Aromatic Hydrocarbons and Trace Metals.   journal   = {International Journal of Environmental and Ecological Engineering}, [online]. World Academy of Science, Engineering and Technology.
    February 2018, vol. 135(3). 230 - 236
    [viewed 19 September 2024]. Available from: https://publications.waset.org/pdf/10008695.