1. Foundations of Databases;Abiteboul,1995
2. The Logic of Conditionals;Adams,1975
3. Constraint propagation with imprecise conditional probabilities;Amarger,1991
4. F. Baader, S. Brandt, C. Lutz, Pushing the EL envelope, in: Proceedings IJCAI-2005, 2005, pp. 364–369
5. The Description Logic Handbook: Theory, Implementation, and Applications,2003