@article{journals/corr/cs-AI-0207072,
  title = "Complexity of Nested Circumscription and Nested Abnormality Theories",
  author = "Marco Cadoli and Thomas Eiter and Georg Gottlob",
  year = "2002",
  journal = "{CoRR}",
  url = "http://arxiv.org/abs/cs.AI/0207072",
  volume = "cs.AI/0207072",
}