@inproceedings{ijcai2018p232,
  title     = {Enhancing Existential Rules by Closed-World Variables},
  author    = {Giovanni Amendola and Nicola Leone and Marco Manna and Pierfrancesco Veltri},
  booktitle = {Proceedings of the Twenty-Seventh International Joint Conference on
               Artificial Intelligence, {IJCAI-18}},
  publisher = {International Joint Conferences on Artificial Intelligence Organization},
  pages     = {1676--1682},
  year      = {2018},
  month     = {7},
  doi       = {10.24963/ijcai.2018/232},
  url       = {https://doi.org/10.24963/ijcai.2018/232},
}