1. Ofcom(2017).The United Kingdom frequency allocation table [WWW document].https://www.ofcom.org.uk/spectrum/information/uk‐fat(accessed 14 October 2019).
2. Waring J.(2015).China's operators sell tower assets to China Tower [WWW document].http://www.mobileworldlive.com/asia/asia‐news/chinas‐operators‐sell‐tower‐assets‐to‐china‐tower(accessed 20 September 2010).
3. GSMA(2018).Spectrum sharing [WWW document]. Public Policy Position.https://www.gsma.com/spectrum/wp‐content/uploads/2019/09/Spectrum‐Sharing‐PPP.pdf(accessed 20 June 2020).
4. Ofcom(2016).A framework for spectrum sharing [WWW document].https://www.ofcom.org.uk/__data/assets/pdf_file/0032/79385/spectrum‐sharing‐framework.pdf(accessed 14 October 2019).
5. Advanced Mobile Phone Service: The Cellular Concept