Yousra Zakaria Ahmed and  Ahmed El Gendy and  Salah El Haggar ,  Sustainability Assessment of Municipal Wastewater Treatment .   journal   = {International Journal of Environmental and Ecological Engineering}, [online]. World Academy of Science, Engineering and Technology.
    January 2017, vol. 122(2). 130 - 134
    [viewed 20 April 2024]. Available from: https://publications.waset.org/pdf/10006347.