PowerPoint presentation by Roland Schertenleib, former director of the Department of Water and Sanitation in Developing Countries at the Swiss Federal Institute of Aquatic Science and Technology, explaining the concept in detail.
Schertenleib, R, (2008): Urban Sanitation systems – building on the Household Centred Environmental Sanitation approach (HCES) . Duebendorf.: EAWAG/SANDEC URL [Accessed: 16.11.2010]