@inproceedings{DBLP:conf/dagstuhl/BosiBCK04,
  author    = {Gianni Bosi and
               Ronen I. Brafman and
               Jan Chomicki and
               Werner Kie{\ss}ling},
  title     = {04271 Abstracts Collection - Preferences: Specification,
               Inference, Applications},
  booktitle = {Preferences},
  year      = {2004},
  ee        = {http://drops.dagstuhl.de/opus/volltexte/2006/451},
  crossref  = {DBLP:conf/dagstuhl/2004P4271},
  bibsource = {DBLP, http://dblp.uni-trier.de}
}

@proceedings{DBLP:conf/dagstuhl/2004P4271,
  editor    = {Gianni Bosi and
               Ronen I. Brafman and
               Jan Chomicki and
               Werner Kie{\ss}ling},
  title     = {Preferences: Specification, Inference, Applications, 27.
               June - 2. July 2004},
  booktitle = {Preferences},
  publisher = {IBFI, Schloss Dagstuhl, Germany},
  series    = {Dagstuhl Seminar Proceedings},
  volume    = {04271},
  year      = {2006},
  ee        = {http://drops.dagstuhl.de/portals/04271/},
  bibsource = {DBLP, http://dblp.uni-trier.de}
}