@InProceedings{descto07b,
  author =	 "J. Delgrande and T. Schaub and H. Tompits",
  title =	 "A Preference-Based Framework for Updating Logic Programs",
  pages =	 "71-83",
  crossref =	 "lpnmr07" 
}
@Proceedings{lpnmr07,
  title =	 "Proceedings of the Ninth International Conference on Logic
                  Programming and Nonmonotonic Reasoning (LPNMR'07)",
  booktitle =	 "Proceedings of the Ninth International Conference on Logic
                  Programming and Nonmonotonic Reasoning (LPNMR'07)",
  editor =	 "C. Baral and G. Brewka and J. Schlipf",
  series =	 "Lecture Notes in Artificial Intelligence",
  volume =	 4483,
  publisher =	 "Springer-Verlag",
  year =	 2007
}