@article{Linke2003,
  author    = {Linke, Thomas},
  title     = {Using nested logic programs for answer set programming},
  issn      = {1613-0073},
  year      = {2003},
  language  = {en}
}
@phdthesis{Frank2003,
  author    = {Frank, Keller},
  title     = {{\"U}ber die Rolle von Architekturbeschreibungen im Software-Entwicklungsprozess},
  pages     = {X, 160 S. : graph. Darst.},
  year      = {2003},
  language  = {de}
}