1. AFNOR (1990) Ammonia Dosage by Indophenol Colorimetric Method, # T90-015, 4th ed.
2. Developing a sand-GAC filter to achieve high-rate biological filtration;Bablon;Journal of American Water Works Association,1988
3. Functioning of biological filters used in drinking-water treatment—the CHABROL model;Billen;J. Water SRT-Aqua,1992
4. Biological nitrification kinetics at low temperature in a drinking-water production plant;Bouillot;Water. Supply,1992
5. Chemistry of Oxidants and Waters Treatment;Doré,1989