@article{IJARFLMST2017,
  title = "Ontological Query Answering under Many-Valued Group Preferences in Datalog+⁄−",
  author = "Bettina Fazzinga and Thomas Lukasiewicz and Maria Vanina Martinez and Gerardo I. Simari and Oana Tifrea-Marciuska",
  year = "2018",
  journal = "International Journal of Approximate Reasoning",
  month = "February",
  pages = "354--371",
  url = "https://doi.org/10.1016/j.ijar.2017.11.008",
  volume = "93",
}