1. GSMA mAutomotive 2025 (2012) Every car connected: forecasting the growth and opportunity 2012 http://www.gsma.com/connectedliving/gsma-2025-every-car-connected-forecasting-the-growth-and-opportunity
2. GSMA mAutomotive (2013) Connected car forecast next five Years 2013 http://www.gsma.com/connectedliving/connected-car-forecast-next-five-years
3. 3GPP TS 23.203 2012 Policy and charging control architecture
4. 3GPP TS 33.220 2012 Generic authentication architecture (GAA); generic bootstrapping architecture http://www.3gpp.org/ftp/Specs/html-info/33-series.htm
5. Ala-Luuko , S. 2006 IPX-a key enabler for IP communication ecosystem http://www.teliasoneraic.com/iccons/groups/public/documents/webdocument/ts020933.pdf