@inproceedings{CaGP10b,
  title = "Query Answering under Non-guarded Rules in {D}atalog+/{-}",
  author = "Cal\`{\i}, Andrea and Gottlob, Georg and Pieris, Andreas",
  year = "2010",
  booktitle = "Proceeding of the 4th International Conference on Web Reasoning and Rule Systems (RR)",
  pages = "1--17",
}