Hien Hoa, T. T. “Removal of Nitrogen Compounds in Slaughterhouse Wastewater by Using Anaerobic Ammonium Oxidation Process”. Journal of Science and Technology in Civil Engineering (JSTCE) - HUCE, vol. 11, no. 6, Dec. 2017, pp. 186-90, https://stce.vjst.net/index.php/en/article/view/956.