1. Monitoring the future: building an early warning system for the Dutch Ministry of Justice;Botterhuis;Futures,2009
2. Out of the Box: CI in the Twitter age—what's useful for CI;Hirnickel;Competitive Intelligence Magazine,2010
3. The future of human benefit knowledge: notes on a world brain for the 21st century;Marien;Futures,2007
4. Knowledge Tools of the Future;Pang,2008
5. For more on Delta Scan and X2, see Sir David King, S. Thomas, Taking science out of the box: foresight recast, Science 316 (2007) 1701–1702.