@inproceedings{DBLP:conf/ijcai/SchaubW01,
  author = {Schaub, Torsten and Wang, Kewen},
  title = {A Comparative Study of Logic Programs with Preference},
  booktitle = {{IJCAI}},
  pages = {597--602},
  publisher = {Morgan Kaufmann},
  year = {2001}
}