@conference{CGHKrKuMaMoWKR12,
  title = "Acyclicity Conditions and their Application to Query Answering in Description Logics",
  author = "Bernardo Cuenca Grau and Ian Horrocks and Markus Krötzsch and Clemens Kupke and Despoina Magka and Boris Motik and Zhe Wang.",
  year = "2012",
  booktitle = "Proceedings of the 13th International Conference on Principles of Knowledge Representation and Reasoning (KR 2012)",
  location = "Rome",
  month = "June",
  publisher = "AAAI Press",
}