WASET
    Jyh-Cherng Chen and  Chang-Yong Liu,  Regeneration of Spent Catalysts with Ozone.   journal   = {International Journal of Environmental and Ecological Engineering}, [online]. World Academy of Science, Engineering and Technology.
    July 2013, vol. 79(7). 414 - 417
    [viewed 19 April 2024]. Available from: https://publications.waset.org/pdf/16310.