1. Foundations of Databases;Abiteboul,1995
2. Least common subsumers and most specific concepts in a description logic with existential restrictions and terminological cycles;Baader,2003
3. An Introduction to Description Logic;Baader,2017
4. Computing least common subsumers in description logics with existential restrictions;Baader,1999
5. Building and structuring description logic knowledge bases using least common subsumers and concept analysis;Baader,2000