Literatur

CGT90

S. Ceri, G. Gottlob, and L. Tanca. Logic Programming and Databases. Surveys in Computer Science. Springer Verlag, Berlin, New York, 1990.

Cod70

E. F. Codd. A relational model of data for large shared data banks. Communications of the ACM, 13(6):377-387, 1970.

Kan90

P. Kanellakis. Elements of Relational Database Theory, chapter 12, pages 1074-1156. Formal Models and Semantics, Handbook of Theoretical Computer Science. Elsevier, 1990.

Ull88

Jeffrey D. Ullman. Principles of database and knowledge-base systems, volume 1. Computer Science Press, Rockville, MD, 1988.