@article{DelgrandeSchaub1997,
  author    = {Delgrande, James Patrick and Schaub, Torsten H.},
  title     = {Compiling reasoning with and about preferences into default logic},
  isbn      = {1-558-60480-4},
  issn      = {1045-0823},
  year      = {1997},
  language  = {en}
}
@article{DelgrandeSchaub1997,
  author    = {Delgrande, James Patrick and Schaub, Torsten H.},
  title     = {Compiling specificity into approaches to nonmonotonic reasoning},
  issn      = {0004-3702},
  year      = {1997},
  language  = {en}
}