1. 2013 ACI Economics Report;ACI,2013
2. UK Airport Data (Annual);CAA,1999
3. UK Regional Air Services: A Study by the Civil Aviation (CAP 754);CAA,2005
4. No-frills Carriers: Revolution or Evolution? A Study by the Civil Aviation Authority (CAP 770);CAA,2006
5. Air Services at UK Regional Airports (CAP 775);CAA,2007