Paper  bibtex   

@incollection{ eps261455,
  booktitle = {Proceedings of the Seventh International Conference on Artificial Life},
  editor = {Mark A. Bedau and John S. McCaskill and Norman Packard and Steen Rasmussen},
  title = {Simulation models as opaque thought experiments},
  author = {Ezequiel A. Di Paolo and Jason Noble and Seth Bullock},
  publisher = {MIT Press, Cambridge, MA},
  year = {2000},
  pages = {497--506},
  url = {http://eprints.soton.ac.uk/261455/}
}