@article{pdseparationaconceptforexpressing,
  title = {p-d-Separation -- A Concept for Expressing Dependence/Independence Relations in Causal Networks},
  author = {Mieczysław A. Kłopotek},
  year = {2020},
  eprint = {2006.09196},
  archivePrefix = {arXiv},
  url = {https://arxiv.org/abs/2006.09196v1},
}