@inproceedings{DBLP:conf/ijcai/FaberK05,
  author = {Faber, Wolfgang and Konczak, Kathrin},
  title = {Strong Equivalence for Logic Programs with Preferences},
  booktitle = {{IJCAI}},
  pages = {430--435},
  publisher = {Professional Book Center},
  year = {2005}
}