@INPROCEEDINGS{bareinboim:pea12-r397
  author = 	 "Bareinboim, E.\ and Pearl, J.",
  title = 	 "Causal inference by surrogate experiments: $z$-identifiability",
  booktitle =    "Proceedings of the Twenty-Eighth Conference on Uncertainty
		  in Artificial Intelligence",
  editor =	 "Nando de Freitas and Kevin Murphy",
  year =         2012,
  pages =        "113--120", 
  publisher =    "AUAI Press", 
  address =	 "Corvallis, OR"
}