1. 3GPP Release 12. http://www.3gpp.org/specifications/releases/68-release-12. 3GPP Release 12. http://www.3gpp.org/specifications/releases/68-release-12.
2. 3GPP TS 23.401. http://www.3gpp.org/DynaReport/23401.htm. 3GPP TS 23.401. http://www.3gpp.org/DynaReport/23401.htm.
3. 3GPP TS 24.008. http://www.3gpp.org/DynaReport/24008.htm. 3GPP TS 24.008. http://www.3gpp.org/DynaReport/24008.htm.
4. 3GPP TS 24.008. http://www.3gpp.org/DynaReport/24008.htm. 3GPP TS 24.008. http://www.3gpp.org/DynaReport/24008.htm.
5. Creating a Digital 6th Sense with LTE Direct. http://tinyurl.com/jj9tdg4. Creating a Digital 6th Sense with LTE Direct. http://tinyurl.com/jj9tdg4.