1. Shaffer, J.H.: Role of general aviation in the national transportation system. In: The Role of General Aviation, Hearing before the Subcommittee on Aviation of the Committee on Commerce, U.S. House of Representatives, Ninety-first Congress, second session, pp. 53–65 (1969)
2. Kern, J.: Aircraft Navigation and Landing Technology: Status of Implementation Hearing before the Subcommittee on Transportation, Aviation, and Materials of the Committee on Science and Technology, U.S. House of Representatives, Ninety-eighth Congress, second session, pp. 181–191 (1984)
3. ICAO.: STOLport Manual, 2nd edn. (1991)
4. Department of Defense.: Dictionary of Military and Associated Terms, JP 1-02 (2010)
5. EASA.: CS-25 Amendment 17, Appendix Q (2015)