@article{BrueningSchaub1999,
  author    = {Br{\"u}ning, Stefan and Schaub, Torsten H.},
  title     = {Avoiding non-ground variables},
  isbn      = {3-540-66131-x},
  year      = {1999},
  language  = {en}
}
@article{BenhammadiNicolasSchaub1999,
  author    = {Benhammadi, Farid and Nicolas, Pascal and Schaub, Torsten H.},
  title     = {Query-answering in prioritized default logic},
  isbn      = {3-540-66131-X},
  year      = {1999},
  language  = {en}
}
@book{Schaub1999,
  author    = {Schaub, Torsten H.},
  title     = {The automation of reasoning with incomplete information : from semantic foundations to efficient computation},
  series = {Lecture notes in computer science},
  volume    = {1409},
  journal   = {Lecture notes in computer science},
  publisher = {Springer},
  address   = {Berlin},
  isbn      = {3-540-64515-2},
  doi       = {10.1007/BFb0054963},
  pages     = {XI, 159 S.},
  year      = {1999},
  language  = {en}
}
@article{BenhammadiNicolasSchaub1999,
  author    = {Benhammadi, Farid and Nicolas, Pascal and Schaub, Torsten H.},
  title     = {Query-answering in prioritized default logic},
  isbn      = {3-540-66131-X},
  year      = {1999},
  language  = {en}
}
@article{BrueningSchaub1999,
  author    = {Br{\"u}ning, Stefan and Schaub, Torsten H.},
  title     = {A voiding non-ground variables},
  year      = {1999},
  language  = {en}
}
@article{LinkeSchaub1999,
  author    = {Linke, Thomas and Schaub, Torsten H.},
  title     = {On bottom-up pre-processing techniques for automated default reasoning},
  isbn      = {3-540-66131-x},
  year      = {1999},
  language  = {en}
}