1. Performance Based Navigation (PBN) Manual, ICAO Doc. 9613 Ser., 4th edn. (ICAO, 2013)
2. P.B. Ober, D.-J. Moelker, E. Theunissen, R.C. Meijer, D. van Willigen, R. Rawlings, M. Perry: The suitability of GPS for basic area navigation, Proc. ION GPS, Kansas City (1997) pp. 1007–1018
3. K.L. Van Dyke: The world after SA: Benefits to GPS integrity, Proc. IEEE PLANS, San Diego (2000) pp. 387–394
4. K. Doucet, Y. Georgiadou: The issue of selective availability, GPS World 1(5), 53–56 (1990)
5. K.D. McDonald: GPS in civil aviation, GPS World 2(8), 52–59 (1991)