1. Airbus, 1998. Airbus Flight Operations Support & Line Assistance. Getting to Grips with the Cost Index Airbus Customer Services, Issue 2. France.
2. ASPIRE, 2012. 2012 ASPIRE Annual Report, http://www.aspire-green.com/mediapublications/docs/annual_report2012.pdf.
3. Mitigation of aviation emissions of carbon dioxide: analysis for Europe;Dray;Transp. Res. Rec.: J. Transp. Res. Board,2010
4. EUROCONTROL/EU, 2012. European ATM Master Plan. 2nd ed. 〈http://www.atmmasterplan.eu/〉.
5. EUROCONTROL/FAA, 2013. Performance Review Commission/Air Traffic Organization System Operations Services, 2012 Comparison of Air Traffic Management-Related Operational Performance: US/Europe. November 2013, 〈http://www.eurocontrol.int/sites/default/files/publication/files/2012-US-EUR-comparison-of-ATM-related-OPS-performance.pdf〉.