1. 1987. Our Common Future. Oxford University Press: Oxford.
2. 1998. Beyond eco-efficiency: sustainability as a driver for innovation, sustainable enterprise perspectives. Sustainable Enterprises Perspectives March. World Resources Institute: Washington, DC. http://www.wri.org/wri.meb/sei/beyond.html [9 January 2003].
3. 1998. The Meaning of Social Entrepreneurship. Stanford University Graduate School of Business: Stanford. [http://www.gsp.Stanford.edu/csi/SEDefinition.html [20 August 2003].
4. Department for Trade and Industry (DTI). 2002. Social Enterprise – a Strategy for Success. DTI: London.