1. Batini, C., Ceri, S., Navathe, S. B.: Conceptual Database Design. An Entity-Relationship-Approach. Benjamin Cummings, Redwood City, California (1992)
2. Batini, C., Furlani, L., Nardelli, E.: What is a good diagram? A pragmatic approach. In: Chen, P. P.-S. (ed.): Proceedings of the 4th International Conference on the Entity-Relationship Approach: The Use of ER Concept in Knowledge Representation. Elsevier, North-Holland, 312–319
3. Becker, J., Rosemann, M., Schütte, R.: Guidelines of Modelling (GoM). Wirtschaftsinformatik 37 (1995) 5, 435–445 (in German)
4. Chen, P. P.-S.: The Entity-Relationship Model: Toward a Unified View of Data. ACM Transactions on Database Systems 1 (1997) 1, 9–36
5. Curran, Th., Keller G.: SAP R/3. Business Blueprint: Understanding the Business Process Reference Model. Prentice Hall, Upper Saddle River (1998)