@inproceedings{DBLP:conf/wlp/Konczak06a,
  title = {Weak Order Equivalence for Logic Programs with Preferences},
  author = {Konczak, Kathrin},
  booktitle = {{WLP}},
  pages = {154--163},
  publisher = {Technische Universit{\"{a}}t Wien, Austria},
  series = {{INFSYS} Research Report},
  volume = {1843-06-02},
  year = {2006}
}