@inproceedings{ijcai2001p89,
  title     = {Graph Theoretical Characterization and Computation of Answer Sets},
  author    = {Linke, Thomas},
  booktitle = {Proceedings of the Seventeenth International Joint Conference on
               Artificial Intelligence, {IJCAI-01}},
  publisher = {International Joint Conferences on Artificial Intelligence},
  pages     = {641--647},
  year      = {2001},
  url       = {https://ijcai.org/proceedings/2001/89},
}