@inproceedings{ijcai-2020-mtl,
  title = "Tractable Fragments of Datalog with Metric Temporal Operators",
  author = "Przemyslaw Walega and Bernardo Cuenca Grau and Mark Kaminski and Egor V. Kostylev.",
  year = "2020",
  booktitle = "Proceedings of the 29th International Joint Conference on Artificial Intelligence (IJCAI 2020)",
}