@inproceedings{conf/ijcai/GottlobGS05,
  title = "The Complexity of Quantified Constraint Satisfaction Problems under Structural Restrictions",
  author = "Georg Gottlob and Gianluigi Greco and Francesco Scarcello",
  year = "2005",
  booktitle = "{IJCAI-05, Proceedings of the Nineteenth International Joint Conference on Artificial Intelligence, Edinburgh, Scotland, UK, July 30-August 5, 2005}",
  editor = "Leslie Pack Kaelbling and Alessandro Saffiotti",
  isbn = "0938075934",
  pages = "150-155",
  publisher = "Professional Book Center",
  url = "http://www.ijcai.org/papers/1231.pdf",
}