@article{journals/tkde/CadoliEG97,
  title = "Default Logic as a Query Language",
  author = "Marco Cadoli and Thomas Eiter and Georg Gottlob",
  year = "1997",
  journal = "{IEEE} Trans. Knowl. Data Eng.",
  number = "3",
  pages = "448-463",
  volume = "9",
  doi = "http://www.informatik.uni-trier.de/~ley/db/journals/tkde/CadoliEG97.html",
}