1. D. Large, Participation and representation, A Review of Sustainability Here and Now, in part of The Great Debate: Development Sustainability Environment, Newcastle Civic Centre on 27 September 2003 (available at: http://www.thegreatdebate.org.uk/GDDSEDL1.html, last visited on 03 October 2008).
2. Risk Society: Towards a New Modernity;Ulrich,1992
3. Cartesian Economics: The Bearing of Physical Science on State Stewardship;Soddy,1922
4. Wealth, Virtual Wealth and Debt;Soddy,1926
5. The next 200 years;Kahn,1976