1. Analysis: ’Spectrum demand for non-government services’, (September 2005) — http://www.spectrumaudit.org.uk/pdf/spectrum_demand.pdf
2. Federal Communications Commission — http://www.fcc.gov
3. The Office of Communications — http://www.ofcom.org.uk
4. Ofcom: ’Spectrum Framework Review’, (November 2003) — http://www.ofcom.org.uk/consult/condocs/sfr
5. The Shared Spectrum Company: ’Spectrum Occupancy Measurements’, National Science Foundation (NSF) (August 2005) — http://www.sharedspectrum.com/?section=nsf_summary