Philippe Besnard. An introduction to default logic. Symbolic computation : artificial intelligence, Springer, 1989. [doi]
@book{Besnard89, title = {An introduction to default logic}, author = {Philippe Besnard}, year = {1989}, url = {http://www.worldcat.org/oclc/20262176}, researchr = {https://researchr.org/publication/Besnard89}, cites = {0}, citedby = {0}, series = {Symbolic computation : artificial intelligence}, publisher = {Springer}, isbn = {0387515666}, }