@inproceedings{DBLP:conf/kr/DelgrandeS94,
  author = {Delgrande, James P. and Schaub, Torsten},
  title = {A General Approach to Specificity in Default Reasoning},
  booktitle = {{KR}},
  pages = {146--157},
  publisher = {Morgan Kaufmann},
  year = {1994}
}