@article{JMLR:v11:spirtes10a,
  author  = {Peter Spirtes},
  title   = {Introduction to Causal Inference},
  journal = {Journal of Machine Learning Research},
  year    = {2010},
  volume  = {11},
  number  = {54},
  pages   = {1643--1662},
  url     = {http://jmlr.org/papers/v11/spirtes10a.html}
}