1. The Economic and Social Benefits of Air Transport;ATAG,2005
2. An inquiry into the link between air transport and employment in Norway;Bråthen,2006
3. Effects of reducing the high price of air travel in remoter regions;Bråthen,2010
4. Discounts and Public Service Obligations in the Airline Market: Lessons from Spain;Calzada,2010
5. Eurocontrol (2005). The economic catalytic effects of air transport in Europe. EEC/SEE/2005/004.