References

1. How Nature Works, by P .Bak
2. Self-Organized Criticality, by H.J. Jensen, Cambridge lecture notes in physics,1998.
3. Self-Organization of Complex Systems, by M. Paczuski and P.Bak, at
   http://xxx.lanl.gov/abs/cond-mat/9906077
4. The Self-Made Tapestry, by P. Ball
5. Gaia, by J.E. Lovelock.
6. Life of the Cosmos, by L. Smolin.
7. A sandpile applets at
   http://pauli.uni-muenster.de/ special/java/sandpile/ver1.1/ and
   http://cmth.phy.bnl.gov/ maslov/Sandpile.htm
8. Fractality and Self-Organised Criticaility of Wars, by Roberts and Turcotte at // http://www.worldscinet.com/journals/fractals/64/robe.html
9. Some websites on Zip's law are at
   http://linkage.rockefeller.edu/wli/zipf/ and
   http://www.cut-the-knot.com/do_you_know/zipfLaw.html
10. Beyond the Zipf-Mandelbrot law in quantitative linguistics, by M. Montemurro, http://xxx.lanl.gov/abs/cond-mat/0104066.
11. See the article at
    http://www.nature.com/nsu/010927/010927-1.html
12. Interacting individuals Leading to Zipf's Law, by M. Marsili and Y. Zhang, http://xxx.lanl.gov/abs/cond-mat/98011289.
13. Fractality and self-organised criticality of wars, by D. Roberts and D. Turcotte, in Fractals, Vol.6 (1998) 351-357.
14. The Richardson Institute for Conflict and Peace Research at
    http://www.lancs.ac.uk/depts/richinst/home/