@inproceedings{ijcai2018p236,
  title     = {First-Order Rewritability of Frontier-Guarded Ontology-Mediated Queries},
  author    = {Pablo Barceló and Gerald Berger and Carsten Lutz and Andreas Pieris},
  booktitle = {Proceedings of the Twenty-Seventh International Joint Conference on
               Artificial Intelligence, {IJCAI-18}},
  publisher = {International Joint Conferences on Artificial Intelligence Organization},
  pages     = {1707--1713},
  year      = {2018},
  month     = {7},
  doi       = {10.24963/ijcai.2018/236},
  url       = {https://doi.org/10.24963/ijcai.2018/236},
}