1. NBW, National Water Management Agreement, available online: http://www.vng.nl/Documenten/Extranet/Milieu/Water%20en%20riolering/NBW_actueel.pdf
2. Design and sustainability assessment of scenarios of urban water infrastructure systems;Hiessl,2001
3. Sewer system design moving into the 21st century—a UK perspective;Ashley;Water Sci. Technol.,2007
4. J.A. Wilsenach, Treatment of source separated urine and its effects on wastewater systems, PhD thesis, Delft University of Technology, 2006, p. 13.
5. M. Mouritz, Sustainable urban water systems: policy and professional praxis. PhD thesis Murdoch University, Australia, 1996, p. 208.