WASET
    Nader Nabhani and  Amir Tofighi,  The Risk Assessment of Nano-particles and Investigation of Their Environmental Impact.   journal   = {International Journal of Environmental and Ecological Engineering}, [online]. World Academy of Science, Engineering and Technology.
    January 2011, vol. 49(1). 14 - 20
    [viewed 26 April 2024]. Available from: https://publications.waset.org/pdf/4277.