@inproceedings{ijcai2015p450,
  title     = {Characterization of the Expressivity of Existential Rule Queries},
  author    = {Rudolph, Sebastian and Thomazo, Michael},
  booktitle = {Proceedings of the Twenty-Fourth International Joint Conference on
               Artificial Intelligence, {IJCAI-15}},
  publisher = {International Joint Conferences on Artificial Intelligence},
  editor    = {Qiang Yang and Michael Wooldridge},
  pages     = {3193--3198},
  year      = {2015},
  month     = {7},
  note      = {Special Track on Knowledge Representation and Reasoning},
  url       = {https://ijcai.org/proceedings/2015/450},
}