1. Air Force Test Pilot School, 1993. Cruise performance theory, In: Performance phase, Vol. 1, Chapter 11, Edwards AFB, CA.
2. Authority, G.B.C.A., 2013. Aeronautical information publication (AIP) United Kingdom: En-route (ENR) 1.1 – general rules.
3. Application of direct transcription to commercial aircraft trajectory optimization;Betts;J. Guidance, Control, Dyn.,1995
4. Survey of numerical methods for trajectory optimization;Betts;J. Guidance, Control, Dyn.,1998
5. Practical methods for optimal control and estimation using nonlinear programming;Betts,2010