T. T. H. Hoa, N. T. M. Hanh, N. T. Lien, and T. Watanabe, “EVALUATION OF THE AMMONIUM REMOVAL CAPABILITIES OF ANAMMOX SLUDGE IN A FIXED BED REACTOR USING FELIBENDY CUBES AS BIOMASS CARRIER”, JSTCE, vol. 10, no. 5, pp. 127–133, Oct. 2016.