1. ITU-R M.2243, Assessment of the global mobile broadband deployments and forecasts for International Mobile Telecommunications, March 2011
2. Cisco, Visual Networking Index: Global Mobile Data Traffic Forecast Update 2013–2018, February 2014
3. IMT-2020 (5G) Promotion Group, 5G Vision and Requirement, May 2014
4. V. Chandrasekhar, J.G. Andrews et~al., Femtocell networks: a survey. IEEE Commun. Mag. 46(9), 59–67 (2008)
5. ITU-R M.2290, Future spectrum requirements estimate for terrestrial IMT, 2014