@inproceedings{DBLP:conf/ecsqaru/DelgrandeS01,
  author = {Delgrande, James P. and Schaub, Torsten},
  title = {How to Reason Credulously and Skeptically within a Single Extension},
  booktitle = {{ECSQARU}},
  series = {Lecture Notes in Computer Science},
  volume = {2143},
  pages = {592--603},
  publisher = {Springer},
  year = {2001}
}