@article{abstractingcausalmodels,
  title = {Abstracting Causal Models},
  author = {Sander Beckers and Joseph Y. Halpern},
  year = {2018},
  eprint = {1812.03789},
  archivePrefix = {arXiv},
  url = {https://arxiv.org/abs/1812.03789v4},
}