1. Walsh, A.E.: UDDI, Soap and WSDL: The Web Services Specification Reference Book. Prentice Hall Professional Technical Reference, Englewood Cliffs (2002)
2. Web services security: Soap message security 1.1, February 2006. http://docs.oasis-open.org/wss/v1.1/wss-v1.1-spec-os-SOAPMessageSecurity.pdf
3. Bajaj, S., et al.: Web services policy framework (wspolicy), March 2006. http://specs.xmlsoap.org/ws/2004/09/policy/ws-policy.pdf
4. Della-Libera, G., et al.: Web services security policy language (ws-securitypolicy), July 2005. http://specs.xmlsoap.org/ws/2005/07/securitypolicy/ws-securitypolicy.pdf
5. Goguen, J.A., Meseguer, J.: Security policies and security models. In: 1982 Proceedings of the IEEE Symposium on Security and Privacy (1982)