@article{VolkmannLinkeWaschulziketal.1998,
  author    = {Volkmann, Gerald and Linke, Thomas and Waschulzik, Thomas and Ohmes, Rick and Schaub, Torsten H. and Wischnewsky, M.},
  title     = {HExProSA - ein hybrides Expertensystem zur Prozeßkontrolle und St{\"o}rfallanalyse von Abwasserbehandlungsanlagen : Erfahrungen bei der Evaluierung eines Prototypen},
  year      = {1998},
  language  = {de}
}
@article{SchaubBruening1998,
  author    = {Schaub, Torsten H. and Br{\"u}ning, Stefan},
  title     = {Prolog technology for default reasoning : proof theory and compilation techniques},
  year      = {1998},
  language  = {en}
}
@article{Schaub1998,
  author    = {Schaub, Torsten H.},
  title     = {The family of default logics},
  year      = {1998},
  language  = {en}
}
@article{NicolasSchaub1998,
  author    = {Nicolas, Pascal and Schaub, Torsten H.},
  title     = {The XRay system : an implementation platform for local query-answering in default logics},
  isbn      = {3-540-65312-0},
  year      = {1998},
  language  = {en}
}
@article{NicolasSchaub1998,
  author    = {Nicolas, Pascal and Schaub, Torsten H.},
  title     = {Un cadre g{\´e}n{\´e}ral pour l'interrogation automatique en logiques des d{\´e}fauts},
  year      = {1998},
  language  = {fr}
}
@article{LinkeSchaub1998,
  author    = {Linke, Thomas and Schaub, Torsten H.},
  title     = {An approach to query-answering in Reiter's default logic and the underlying existence of extensions problem.},
  isbn      = {3-540-65141-1},
  year      = {1998},
  language  = {en}
}
@article{DelgrandeSchaub1998,
  author    = {Delgrande, James Patrick and Schaub, Torsten H.},
  title     = {Reasoning with sets of preferences in default logic},
  isbn      = {3-540- 65271-x},
  year      = {1998},
  language  = {en}
}
@article{BibelBrueningOttenetal.1998,
  author    = {Bibel, Wolfgang and Br{\"u}ning, Stefan and Otten, Jens and Rath, Thomas and Schaub, Torsten H.},
  title     = {Compressions and extensions},
  year      = {1998},
  language  = {en}
}
@article{BesnardSchaub1998,
  author    = {Besnard, Philippe and Schaub, Torsten H.},
  title     = {Signed systems for paraconsistent reasoning},
  year      = {1998},
  language  = {en}
}
@article{BesnardSchaub1998,
  author    = {Besnard, Philippe and Schaub, Torsten H.},
  title     = {Characterization of non-monotone non-constructive systems},
  issn      = {1012-2443},
  year      = {1998},
  language  = {en}
}
@article{BesnardSchaub1998,
  author    = {Besnard, Philippe and Schaub, Torsten H.},
  title     = {Signed systems for paraconsistent reasoning},
  issn      = {0168-7433},
  year      = {1998},
  language  = {en}
}
@article{BenhammadiNicolasSchaub1998,
  author    = {Benhammadi, Farid and Nicolas, Pascal and Schaub, Torsten H.},
  title     = {Extension calculus and query answering in prioritized default logic},
  isbn      = {3-540-64993-X},
  year      = {1998},
  language  = {en}
}
@article{BenhammadiNicolasSchaub1998,
  author    = {Benhammadi, Farid and Nicolas, Pascal and Schaub, Torsten H.},
  title     = {Extension calculus and query answering in prioritized default logic},
  isbn      = {3-540- 64993-X},
  year      = {1998},
  language  = {en}
}