1. Foundations of Databases;Abiteboul,1995
2. The object-oriented database system manifesto;Atkinson,1989
3. Conceptual Database Design—An Entity-Relationship Approach;Batini,1992
4. Semantics and verification of object-role models;van Bommel;Information Systems,1991
5. A unifying object role modelling approach;Bronts;Information Systems,1995