@article{alternativemarkovandcausalpropertiesfor,
  title = {Alternative Markov and Causal Properties for Acyclic Directed Mixed Graphs},
  author = {Jose M. Peña},
  year = {2015},
  eprint = {1511.05835},
  archivePrefix = {arXiv},
  url = {http://arxiv.org/abs/1511.05835v4},
}