@article{characterizingtheprogramexpressivepower,
  title = {Characterizing the Program Expressive Power of Existential Rule Languages},
  author = {Heng Zhang},
  year = {2021},
  eprint = {2112.08136},
  archivePrefix = {arXiv},
  url = {https://arxiv.org/abs/2112.08136v2},
}