1. 3GPP TS 23. 228 V7. 4. 0, IP Multimedia Subsystem (IMS), Stage 2, (Release 7), (2006).
2. J. Rosenberg et al., SIP: session initiation protocol, RFC 3261, (2002).
3. Jari Hamalainen, IPv6 Enabling Peer-to-Peer IMS Services, North American Global IPv6 Summit San Diego, CA, U.S. A, (2003).
4. Marco Tomsu, Peter Domschitz. IMS, Peer-to-Peer and Beyond, IKR/VFF-IND Workshop Dienste im Next Generation Network, University of Stuttgart, (2006).
5. M. Castro, P. Druschel, A. Ganesh, A. Rowstron and D.S. Wallach, Secure routing for structured peer-to-peer overlay networks, Proc. Of the 5th Usenix Symposium on Operating Systems Design and Implementation, Boston, MA, December (2002).