@article{markovpropertiesformixedgraphs,
  title = {Markov properties for mixed graphs},
  author = {Kayvan Sadeghi and Steffen Lauritzen},
  year = {2011},
  eprint = {1109.5909},
  archivePrefix = {arXiv},
  url = {http://arxiv.org/abs/1109.5909v5},
}