1. Machine-to-machine (M2M)-the rise of the machines 2011
2. Yankee Group Mobile broadband connected future: from billions of people to billions of things 4G Americas White Paper 2011
3. 3GPP TS 22.368. Service requirements for machine-type communications (MTC) 2011
4. 3GPP TR 23.888. System improvements for machine-type communications 2011
5. 3GPP TR 37.868. Study on RAN improvements for machine-type communications 2011