@inproceedings{DBLP:conf/drums/NicolasS98,
  author = {Nicolas, Pascal and Schaub, Torsten},
  title = {The XRay system: An implementation platform for local query-answering in default logics},
  booktitle = {Applications of Uncertainty Formalisms},
  series = {Lecture Notes in Computer Science},
  volume = {1455},
  pages = {354--378},
  publisher = {Springer},
  year = {1998}
}