@PhdThesis{shpitser:08-r341,
  author =   "Shpitser, I.",
  title =    "Complete Identification Methods for Causal Inference",
  school =   "Computer Science Department, University of California",
  year =     2008,
  address =  "Los Angeles, CA",
  month =    "April",
  notes =    "R-341"
}