1. Lecture Notes in Computer Science;T.L. Alves,2005
2. Baader, F., Horrocks, I., Sattler, U.: Description logics. In: Staab, S., Studer, R. (eds.) Handbook on Ontologies, International Handbooks on Information Systems, pp. 3–28. Springer, Heidelberg (2004)
3. Balzer, R.: Transformational implementation: An example. IEEE TSE SE-7(1) (1981)
4. Batini, C., Ceri, S., Navathe, S.B.: Conceptual Database Design, Benjamin/Cummings (1992)
5. Batini, C., Di Battista, G., Santucci, G.: Structuring Primitives for a Dictionary of Entity Relationship Data Schemas. IEEE TSE 19(4) (1993)