1. Airbus, 1993a. Flight Crew Operation Manual (FCOM). A320. Version 1.3.1.
2. Airbus, 1993b. Flight Crew Operation Manual (FCOM): A320, Version 1.3.1.
3. Airbus, 1998. Getting to Grips with the Cost Index, Issue II. Flight Operations Support and Line Assistance (STL), Customer Services Directorate, Blagnac.
4. Australia, A., 2007. Annual Report. Tech. rep.
5. Ground delay program planning under uncertainty based on the ration-by-distance principle;Ball;Transport. Sci.,2010