@article{Wang2001,
  author    = {Wang, Kewen},
  title     = {A comparative study of disjunctive well-founded semantics},
  isbn      = {3-540-42593-4},
  year      = {2001},
  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{Wang2001,
  author    = {Wang, Kewen},
  title     = {Disjunctive well-founded semantics revisited},
  year      = {2001},
  language  = {en}
}
@article{Wang2001,
  author    = {Wang, Kewen},
  title     = {A top-down procedure for disjucntive well-founded semantics},
  year      = {2001},
  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{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}
}
@article{Wang2001,
  author    = {Wang, Kewen},
  title     = {A top-down procedure for disjucntive well-founded semantics},
  isbn      = {3-540-42254-4},
  year      = {2001},
  language  = {en}
}