Ayoub, M. and El-Morsy, A. (2021) “Upgrading of an Extended Aeration System to Improve Wastewater Treatment”, American Scientific Research Journal for Engineering, Technology, and Sciences, 81(1), pp. 23–35. Available at: https://asrjetsjournal.org/American_Scientific_Journal/article/view/6983 (Accessed: 15 September 2025).