1. Alexander, C., Ishikawa, S., Silverstein, M.: A Pattern Language: Towns, Buildings, Construction. Oxford University Press, Oxford (1977)
2. Atkinson, C., Kühne, T.: The Role of Metamodeling in MDA. In: Bezivin, J., France, R. (eds.) Proceedings of the International Workshop in Software Model Engineering (in conjunction with the UML 2002), Dresden, Germany (October 2002)
3. Brinkkemper, S., Lyytinen, K., Welke, R. J. (eds.) Method Engineering. Principles of method construction and tool support. Proceedings of the IFIP TC8, WG8.1/8.2 Working Conference on Method Engineering, Atlanta, USA. Chapman & Hall, Sydney (August 1996)
4. Buschmann, F., Meunier, R., Rohnert, H., Sommerlad, P., Stal, M.: Pattern- Oriented Software Architecture - A System of Patterns. John Wiley & Sons, Chichester (1996)
5. ebXML: ebXML Homepage, http://www.ebxml.org (access 2003-03-08)