1. UN declaration (22March 2011) found on http://www.un.org/apps/news/story.asp?Cr1=sanitation&NewsID=37855&Cr=water.
2. London desalination (2 June 2010) found on http://www.bbc.co.uk/news/10213835.
3. Farley, M; Trow, S (2003) Losses in Distribution Networks – A Practitioner's Guide to Assessment, Monitoring and Control Published by IWA, London.
4. Rogers, D; Mangano, A (2005) Improving Efficiency by reducing NRW – San Pedro Sula, Honduras: IWA Efficient 2005 Conference, Santiago, Chile.
5. Rogers, D; Bettin, A. (2011) EU LIFE PALM Project – Defining the optimum level of leakage VI EWRA International Symposium - Water Engineering and Management in a Changing Environment Catania, Italy.