@article{DelgrandeSchaubTompitsetal.2002,
  author    = {Delgrande, James Patrick and Schaub, Torsten H. and Tompits, Hans and Wang, Kewen},
  title     = {Towards a classification of preference handling approaches in nonmonotonic reasoning},
  isbn      = {1-577-35166-5},
  year      = {2002},
  language  = {en}
}
@article{Wang2001,
  author    = {Wang, Kewen},
  title     = {Disjunctive well-founded semantics revisited},
  year      = {2001},
  language  = {en}
}
@article{Wang2000,
  author    = {Wang, Kewen},
  title     = {Argumentation-based abduction in disjunctive logic programming},
  year      = {2000},
  language  = {en}
}
@article{WangZhou2001,
  author    = {Wang, Kewen and Zhou, Lizhu},
  title     = {An extension to GCWA and query evaluation for disjunctive deductive databases},
  year      = {2001},
  language  = {en}
}
@article{WangZhouLin2000,
  author    = {Wang, Kewen and Zhou, Lizhu and Lin, Fangzhen},
  title     = {Alternating fixpoint theory for logic programs with priority},
  isbn      = {3-540-67797-6},
  year      = {2000},
  language  = {en}
}
@article{Wang2001,
  author    = {Wang, Kewen},
  title     = {A top-down procedure for disjucntive well-founded semantics},
  year      = {2001},
  language  = {en}
}
@article{Wang2001,
  author    = {Wang, Kewen},
  title     = {A top-down procedure for disjucntive well-founded semantics},
  isbn      = {3-540-42254-4},
  year      = {2001},
  language  = {en}
}
@article{SchaubWang2003,
  author    = {Schaub, Torsten H. and Wang, Kewen},
  title     = {A semantic framework for prefernce handling in answer set programming},
  year      = {2003},
  language  = {en}
}
@article{SchaubWang2001,
  author    = {Schaub, Torsten H. and Wang, Kewen},
  title     = {A comparative study of logic programs with preference},
  year      = {2001},
  language  = {en}
}
@article{SchaubWang2001,
  author    = {Schaub, Torsten H. and Wang, Kewen},
  title     = {A comparative study of logic programs with preference},
  isbn      = {1-558-60777-3},
  issn      = {1045-0823},
  year      = {2001},
  language  = {en}
}