WASET
    Debabrata Pradhan and  Dong J. Kim and  Jong G. Ahn and  Seoung W. Lee,  Microbial Leaching Process to Recover Valuable Metals from Spent Petroleum Catalyst Using Iron Oxidizing Bacteria.   journal   = {International Journal of Chemical and Molecular Engineering}, [online]. World Academy of Science, Engineering and Technology.
    February 2010, vol. 38(2). 232 - 236
    [viewed 20 April 2024]. Available from: https://publications.waset.org/pdf/949.