1. Erl, T.: Service-Oriented Architecture - Concepts, Technology, and Design, 6th edn. Prentice Hall, Englewood Cliffs (2006)
2. W3C. Web Services Choreography Description Language (WSCDL) Version 1.0 - W3C Candidate Recommendation - 9 November 2005 (2005)
3. W3C. Web Services Description Language (WSDL) Version 2.0 - W3C Recommendation - 26 June 2007 (2007)
4. Lecture Notes in Computer Science;R. Sanders,2005
5. Sanders, R., Bræk, R.: Modeling Peer-to-peer Service Goals in UML. In: Proc. of the 2nd Intl. Conf. on Software Engineering and Formal Methods (SEFM 2004), IEEE Computer Society Press, Los Alamitos (2004)