1. 5 Report of Institute of Navigation S.S.T. Advisory Committee, April 1962.
2. 3 Hooton E. N. (1962). An Analysis of Three-Dimensional Navigation and Traffic Control in the Terminal Area (Slant Airways). Report No. 8420-1. Contract FAA/BRD-357.
3. 1 Power J. K. (1961). Some Considerations of Sonic Boom, a study conducted by the F.A.A., Office of Plans.