T. Hoa, N. Hanh, N. 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.