@article{adatacomplexityandrewritability,
  title = {A tetrachotomy of ontology-mediated queries with a covering axiom},
  author = {Olga Gerasimova and Stanislav Kikot and Agi Kurucz and Vladimir Podolskii and Michael Zakharyaschev},
  year = {2020},
  eprint = {2006.04167},
  archivePrefix = {arXiv},
  url = {https://arxiv.org/abs/2006.04167v4},
}