@InCollection{tian:pea01-r280u,
  author =       "Tian, J.\ and Pearl, J.",
  title =        "Causal Discovery from Changes",
  booktitle =    "Proceedings of the Seventeenth Conference on
                  Uncertainty in Artificial Intelligence",
  publisher =    "Morgan Kaufmann",
  address =      "San Francisco, CA",
  year =         2001,
  pages =        "512--521"
}