1. 3GPP: 3GPP System Architecture Evolution (SAE); Security architecture. TS 33.401, 3rd Generation Partnership Project (3GPP) (2011), http://www.3gpp.org/ftp/Specs/html-info/33401.htm
2. 3GPP: Numbering, addressing and identification. TS 23.003, 3rd Generation Partnership Project (3GPP) (2011), http://www.3gpp.org/ftp/Specs/html-info/23003.htm
3. 3GPP: Evolved universal terrestrial radio access (E-UTRA) and evolved universal terrestrial radio access network (EUTRAN), Overall Description. TS 36.300, 3rd Generation Partnership Project (3GPP) (2012)
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