@inproceedings{DBLP:conf/aaai/BesnardS93,
  author = {Besnard, Philippe and Schaub, Torsten},
  title = {A Context-Based Framework for Default Logics},
  booktitle = {{AAAI}},
  pages = {406--411},
  publisher = {{AAAI} Press / The {MIT} Press},
  year = {1993}
}