1. The theory of joins in relational databases;Aho;ACM Trans. Database Syst.,1979
2. Conceptual Database Design: An Entity-Relationship Approach;Batini,1992
3. Object-Oriented Modeling and Design for Database Applications;Blaha,1998
4. Atomicity and normalization;Carver,2008
5. A relational model of data for large shared data banks;Codd;CACM,1970