@TechReport{li:21-r507,
  author = 	 "Li, A.,
  title = 	 "Unit Selection Based on Counterfactual Logic",
  institution =  "Ph.D. Thesis, Department of Computer Science, 
 		  University of California, Los Angeles",
  address = 	 "CA",
  year = 	 2021,
  number =	 "R-507, {$<$http://ftp.cs.ucla.edu/pub/stat\_ser/r507.pdf$>$}"
}