1. Technical Specifications
2. 3GPP Technical Specifications http://www.3gpp.org
3. The 3GPP specifications referred to in this book are from the Release 99, Release 4, Release 5, and Release 6 set of specifications
4. 3GPP2 Technical Specifications http://www.3gpp2.org
5. European Telecommunication Standards Institute http://www.etsi.org