@InProceedings{bessch98b.bib,
  author =	 "P. Besnard and T. Schaub",
  title =	 "Characterization of non-monotone non-constructive systems",
  booktitle =	 "Proceedings of the Fifth Pacific Rim
     International Conference on Artificial Intelligence (PRICAI'98)",
  editor = "H.-Y. Lee and H. Motoda",
  pages =	 "134-145",
  publisher = "Springer Verlag",
  year =	 "1998"
}