Zhao, Qing, Xin Chen, Ming Tong, Yin Zhao, Yanbo Zhou, and Jun Lu. “Removal of Ammonium Nitrogen from Petrochemical Wastewater by Anaerobic-Aerobic Process”. Asian Journal of Chemistry 25, no. 17 (November 11, 2013): 9591–9594. Accessed April 26, 2024. https://asianpubs.org/index.php/ajchem/article/view/25_18_37.