@article{JMLR:v9:xie08a,
  author  = {Xianchao Xie and Zhi Geng},
  title   = {A Recursive Method for Structural Learning of Directed Acyclic Graphs},
  journal = {Journal of Machine Learning Research},
  year    = {2008},
  volume  = {9},
  number  = {14},
  pages   = {459--483},
  url     = {http://jmlr.org/papers/v9/xie08a.html}
}