Ezechi, E. H., Kutty, S. R. B. M., Isa, M. H., Malakahmad, A., & Aminu, N. (2015). An Integrated Attached Growth Bioreactor for the Treatment of Wastewater. Research Journal of Applied Sciences, Engineering and Technology, 11(10), 1066-1070. https://www.airitilibrary.com/Article/Detail?DocID=20407467-201512-201601200034-201601200034-1066-1070