@inproceedings{ijcai2001p23,
  title     = {Complexity of Nested Circumscription and Abnormality Theories},
  author    = {Cadoli, Marco and Eiter, Thomas and Gottlob, Georg},
  booktitle = {Proceedings of the Seventeenth International Joint Conference on
               Artificial Intelligence, {IJCAI-01}},
  publisher = {International Joint Conferences on Artificial Intelligence},
  pages     = {169--173},
  year      = {2001},
  url       = {https://ijcai.org/proceedings/2001/23},
}