1. Association Francaise de Normalisation (1990) Eaux Méthodes d'Essai. Ammonia Dosage by Indophenol Colorimetric Method, Method #T90-015, 4th edn. Paris, France
2. American Public Health Association — APHA (1992) Standard Methods for the Examination of Water and Wastewater, 18th edn. American Public Health Association, Washington, DC
3. Bablon G., Bellamy W. D., Billen G., Bourbigot M.-M., Daniel B., Erb F., Gomella C., Gordon G., Hartemann P., Joret J.-C., Knocke W., Langlais B., Laplanche A., Legube B., Lykins B., Martin G., Martin N., Montiel A., Morin M.-F., Miltner R. S., Perrine D., Prévost M., Reckhow D. A., Servais P., Singer P. C., Sproul O. J. and Ventresque C. (1991) Practical application of ozone: Principles and case studies. In Ozone in Water Treatment: Application and Engineering (Edited by Langlais B., Reckhow D. A. and Brink D. R.), pp. 133–316. Lewis Publisher, Chelsea, MI, U.S.A
4. Characklis W. G. (1988) Bacterial Regrowth in Distribution Systems. AWWARF Research Report, Denver, CO, U.S.A., 332 pp
5. Coallier J., Rompré A., Prévost M. and Duchesne D. (1993) Direct viable count: New method to measure active bacteria in distribution systems. AWWA-WQTC Proceedings, Miami (Fla.), pp. 925–936