1. ITU-T Recommendation Y.2012. Functional requirements and architecture of the NGN release 1 (2006)
2. ITU-T Recommendation E.860. Framework of a service level agreement (2002)
3. 3GPP TS 23.228: IP Multimedia Subsystem (IMS); Stage 2, Release 8 (2008)
4. Information Technology - Multimedia framework (MPEG-21) - Part 7: Digital Item Adaptation, ISO/IEC 21000-7 (2004)
5. Boula, L., Koumaras, H., Kourtis, A.: An Enhanced IMS Architecture Featuring Cross-Layer Monitoring and Adaptation Mechanisms. ICAS, Spain (2009)