1. Corporate planning for an uncertain future;Beck;Long Range Planning,1982
2. Forecasting with scenarios;Bunn;European Journal of Operational Research,1993
3. Soft Systems Methodology in Action;Checkland,1990
4. Planning as learning;De Geus;Harvard Business Review,1988
5. Letters to Thinkers, Further Thoughts on Lateral Thinking;De Bono,1987