1. Cisco Visual Networking Index: Global Mobile Data Traffic Forecast Update, 2015–2020https://www.cisco.com/c/dam/m/en_in/innovation/enterprise/assets/mobile-white-paper-c11-520862.pdf
2. Cisco Visual Networking Index: Global Mobile Data Traffic Forecast Update, 2016–2021https://www.ramonmillan.com/documentos/bibliografia/VisualNetworkingIndexGlobalMobileDataTrafficForecastUpdate2016_Cisco.pdf
3. Cisco Visual Networking Index: Forecast and Trends, 2017–2022https://www.ericsson.com/en/press-releases/2018/11/5g-estimated-to-reach-1.5-billion-subscriptions-in-2024--ericsson-mobility-report
4. 5G estimated to reach 1.5 billion subscriptions in 2024-Ericsson Mobility Report. Report 2018https://newsroom.cisco.com/press-release-content?type=webcontent&articleId=1955935
5. Robust Hybrid Beamforming Scheme for Millimeter-Wave Massive-MIMO 5G Wireless Networks