@article{JMLR:v13:su12a,
  author  = {Xiaogang Su and Joseph Kang and Juanjuan Fan and Richard A. Levine and Xin Yan},
  title   = {Facilitating Score and Causal Inference Trees for Large Observational Studies},
  journal = {Journal of Machine Learning Research},
  year    = {2012},
  volume  = {13},
  number  = {95},
  pages   = {2955--2994},
  url     = {http://jmlr.org/papers/v13/su12a.html}
}