Muhammad Rizwan Azhar and Emadadeen Ali, Periodic Control of a Wastewater Treatment Process to Improve Productivity. journal = {International Journal of Environmental and Ecological Engineering}, [online]. World Academy of Science, Engineering and Technology. April 2013, vol. 76(4). 209 - 214 [viewed 20 April 2024]. Available from: https://publications.waset.org/pdf/4473.