D. W. Kim  and  D. J. Ryu and  M. J. Go and  D. Chang and  S. B. Han and  J. M. Hur and  B. R. Chung and  B. K. Kim and  Yeon Hye Jin,  Nitrogen Removal in a High-efficiency Denitrification/Oxic Filter treatment System for Advanced Treatment of Municipal Wastewater.   journal   = {International Journal of Environmental and Ecological Engineering}, [online]. World Academy of Science, Engineering and Technology.
    December 2010, vol. 48(12). 700 - 702
    [viewed 26 April 2024]. Available from: https://publications.waset.org/pdf/2244.