Kasmuri, Norhafezah, Robert William Lovitt, and . . “Inhibition of High Substrate Concentration of Ammonia-Nitrogen in Bio-Filter”. International Journal of Engineering & Technology 7, no. 4.18 (November 27, 2018): 292–296. Accessed March 2, 2024. https://www.sciencepubco.com/index.php/ijet/article/view/21937.