@article{adirectmethodforestimatingacausal,
  title = {A direct method for estimating a causal ordering in a linear non-Gaussian acyclic model},
  author = {Shohei Shimizu and Aapo Hyvarinen and Yoshinobu Kawahara},
  year = {2014},
  eprint = {1408.2038},
  archivePrefix = {arXiv},
  url = {http://arxiv.org/abs/1408.2038v1},
}