WASET
    Laleh Yerushalmi and  Fariborz Haghighat and  Maziar Bani Shahabadi,  Contribution of On-Site and Off-Site Processes to Greenhouse Gas (GHG) Emissions by Wastewater Treatment Plants.   journal   = {International Journal of Environmental and Ecological Engineering}, [online]. World Academy of Science, Engineering and Technology.
    June 2009, vol. 30(6). 144 - 148
    [viewed 24 April 2024]. Available from: https://publications.waset.org/pdf/9731.