1. Gartner Gartner Forecasts Worldwide 5G Network Infrastructure Revenue to Reach $4.2 Billion in 2020 Gartner Inc. 56 Top Gallant Road Stamford CT 06902 USA EGHAM U.K. August 22 2019 Available online:https://www.gartner.com/en/newsroom/press-releases/2019-08-22-gartner-forecasts-worldwide-5g-networkinfrastructure().
2. Stage 2021 3 Third Generation Partnership Project. 5G System; Technical Realization of Service Based Architecture
3. UK Department for Digital Culture Media & Sport “UK Telecoms supply chain review report” Telecommunication (Security) Bill 2019‐21 UK July2019.
4. The Prague Proposals “The chairman statement on cyber security of communication networks in a globally digitalized world ” Prague 5G Security Conference May2019.