1. Johnson, N.F., Jefferies, P. and Hui, P.M.: Financial Market Complexity. Oxford University Press (2003)
2. Johnson, N.F.: Two’s Company, Three is Complexity. Oneworld Publishing (2007)
3. Johnson, N.F., Spagat, M., Restrepo, J.A., Becerra, O., Bohorquez, J.C., Suarez, N., Restrepo, E.M., Zarama, R.: For full details of this work, and the underlying model, see the e-print titled ‘Universal patterns underlying ongoing wars and terrorism’. available at http://xxx.lanl.gov/abs/physics/0605035
4. Couzin, I.D. and Krause, J.: Self-organization and collective behavior of vertebrates. Advances in the Study of Behavior 32 (2003) 1
5. Couzin, I.D., Krause, J., Franks, N.R. and Levin, S.A.: Effective leadership and decision making in animal groups on the move. Nature 433 (2005) 513