@inproceedings{ijcai1999p10,
  title     = {On the Complexity of Model Checking for Propositional Default Logics: New Results and Tractable Cases},
  author    = {Baumgartner, Robert and Gottlob, Georg},
  booktitle = {Proceedings of the Sixteenth International Joint Conference on
               Artificial Intelligence, {IJCAI-99}},
  publisher = {International Joint Conferences on Artificial Intelligence},
  editor    = {Thomas Dean},
  pages     = {64--68},
  year      = {1999},
  note      = {Automated Reasoning},
  url       = {https://ijcai.org/proceedings/1999/10},
}