Hien Hoa, T. T. “Study on Ammonium Removal in Domestic Wastewater from Dormitory of National University of Civil Engineering”. Journal of Science and Technology in Civil Engineering (JSTCE) - HUCE, vol. 11, no. 6, Dec. 2017, pp. 191-7, https://stce.vjst.net/index.php/en/article/view/957.