WASET
    Feng Zhou and  Yuyan Wang,  Detection of Airborne Bacteria and Mildew in the Shanghai Metro System.   journal   = {International Journal of Medical and Health Sciences}, [online]. World Academy of Science, Engineering and Technology.
    December 2012, vol. 72(12). 653 - 656
    [viewed 16 April 2024]. Available from: https://publications.waset.org/pdf/538.