1. Current Market Outlook 2014–2033http://www.boeing.com/assets/pdf/commercial/cmo/pdf/Boeing_Current_Market_Outlook_2014.pdf
2. Flying on Demand 2014 2033—Global Market Forecast, 2014https://www.google.com/url?sa=t&rct=j&q=&esrc=s&source=web&cd=3&ved=0ahUKEwjjzruNvrnSAhXJI5QKHUi9AVkQFggoMAI&url=https%3A%2F%2Fwww.airbusgroup.com%2Fdam%2Fassets%2Fairbusgroup%2Fint%2Fen%2Finvestor-relations%2Fdocuments%2F2014%2FPublications%2Fpresentations%2FAirbus-GMF-book-2014-2033%2FAirbus%2520GMF%2520book%25202014-2033.pdf&usg=AFQjCNE4RUzq1pSBG_26-aP6oKHLDzOF-w&sig2=i9mrrEHSHw-7gGxoCcNoHg&cad=rja
3. Report of the High Level Group on Aviation Researchhttp://ec.europa.eu/transport/sites/transport/files/modes/air/doc/flightpath2050.pdf