@inproceedings{DBLP:conf/ki/BillingtonAGM99,
  author    = {David Billington and
               Grigoris Antoniou and
               Guido Governatori and
               Michael J. Maher},
  title     = {Revising Nonmonotonic Theories: The Case of Defeasible Logic},
  booktitle = {KI},
  year      = {1999},
  pages     = {101-112},
  ee        = {http://dx.doi.org/10.1007/3-540-48238-5_8},
  crossref  = {DBLP:conf/ki/1999},
  bibsource = {DBLP, http://dblp.uni-trier.de}
}

@proceedings{DBLP:conf/ki/1999,
  editor    = {Wolfram Burgard and
               Thomas Christaller and
               Armin B. Cremers},
  title     = {KI-99: Advances in Artificial Intelligence, 23rd Annual
               German Conference on Artificial Intelligence, Bonn, Germany,
               September 13-15, 1999, Proceedings},
  booktitle = {KI},
  publisher = {Springer},
  series    = {Lecture Notes in Computer Science},
  volume    = {1701},
  year      = {1999},
  isbn      = {3-540-66495-5},
  bibsource = {DBLP, http://dblp.uni-trier.de}
}