1. Taken from the DEFRA Web site — http://horizonscanning.defra.gov.uk/
2. Mintzberg H: ’The Rise and Fall of Strategic Planning’, Financial Times, Prentice Hall, London (2000).
3. Technology Futures Inc — http://www.tfi.com/rescon/five_views.html
4. Ringland F: ’Scenario Planning’, Second Edition, John Wiley and Sons Ltd, London (2006).
5. Pidd M: ’Tools for Thinking, Modelling in Management Science’, Second Edition, John Wiley and Sons (2003).