@TechReport{tian:pea01-r285,
  author =   	 "Tian, J. and Pearl, J.",
  title =    	 "Causal discovery from changes:  {A} {B}ayesian approach",
  institution =  "Computer Science Department, UCLA",
  year =     	 2001,
  number =   	 "R-285",
  month = 	 "February"
}