@inproceedings{DOTT09,
  title = "Reasoning over Large Semantic Datasets",
  author = "Roberto De Virgilio and Giorgio Orsi and Letizia Tanca and Riccardo Torlone",
  year = "2009",
  booktitle = "Proc. of the 17th Italian Symp. on Advanced Database Systems (SEBD)",
  pages = "37-44",
}