1. Brown, A. 2001 Antidote to the Stiff Upper Lip.The Observer (January 21):11.
2. The Tao of Physics;Capra,1976
3. International Tourism Policy;Edgell,1990
4. Peace by Peaceful Means. Peace and Conflict, Development and Civilization;Galtung,1996
5. Chaos: Making a New Science;Gleick,1987