@InProceedings{delasc07a,
  author =	 "J. Delgrande and J. Lang and T. Schaub",
  title =	 "Belief change based on global minimisation",
  crossref =	 "ijcai07",
  pages =	 "2468-2473"
}
@Proceedings{ijcai07,
  title =	 "Proceedings of the Twentieth International Joint Conference
                  on Artificial Intelligence (IJCAI'07)",
  year =	 2007,
  booktitle =	 "Proceedings of the Twentieth International Joint Conference
                  on Artificial Intelligence (IJCAI'07)",
  editor =	 "M. Veloso",
  publisher =	 "AAAI Press/The MIT Press",
  note =	 "Available at http://www.ijcai.org/papers07/contents.php"
}