@inproceedings{DBLP:conf/ecsqaru/BenhammadiNS99, title = {Query-Answering in Prioritized Default Logic}, author = {Benhammadi, Farid and Nicolas, Pascal and Schaub, Torsten}, booktitle = {{ESCQARU}}, pages = {32--42}, publisher = {Springer}, series = {Lecture Notes in Computer Science}, volume = {1638}, year = {1999} }