@incollection{zenilalgo,
  title = "On the Algorithmic Nature of the World",
  author = "H. Zenil, J.-P. Delahaye",
  year = "2010",
  booktitle = "Information and Computation",
  editor = "G. Dodig-Crnkovic and M. Burgin (eds)",
  publisher = "World Scientific Publishing Company",
}