Lüthi, C., Morel, A., Tilley, E., & Ulrich, L. (2011). Community-Led Urban Environmental Sanitation Planning (CLUES). (Eawag-Sandec/WSSCC/UN-HABITAT, Ed.). Dübendorf, Switzerland: Swiss Federal Institute of Aquatic Science and Technology (Eawag).
Lüthi, C., Morel, A., Tilley, E., & Ulrich, L. (2011). Community-Led Urban Environmental Sanitation Planning (CLUES). (Eawag-Sandec/WSSCC/UN-HABITAT, Ed.). Dübendorf, Switzerland: Swiss Federal Institute of Aquatic Science and Technology (Eawag).