1. Age-Friendly Portland Advisory Council 2013 Action plan for an age-friendly Portland http://agefriendlyportland.org/wp-content/uploads/2013/08/afp_plan.pdf
2. American Planning Association 2000 Policy guide on planning for sustainability https://www.planning.org/policy/guides/adopted/sustainability.htm
3. Atkins 2013 The low carbon planning and design handbook www.atkinsglobal.com/en-GB/group/sectors-and-services/sectors/urban-development/low-carbon-cities
4. Australian Sustainable Built Environment Council 2011 Creating places for people: An urban design protocol for Australian cities http://urbandesign.org.au/downloads/files/INFRA1219_MCU_R_SQUARE_URBAN_PROTOCOLS_1111_WEB_FA2.pdf
5. Indicators for the sustainability assessment of wastewater treatment systems;Balkema;Urban Water,2002