1. Jamison L., Sommer G. S., Porche I. R. III: High-altitude airships for the future force army. RAND Corporation Arroyo Center, Santa Monica (2005)
2. http://www.friendsofcrc.ca/Projects/SHARP/sharp.html .
3. Struzak R.: HAPs–High altitude platforms. The Abdus Salam International Centre for Theoretical Physics (ICTP), Italy (2007)
4. Technical and operational characteristics of gateway links in the fixed service using high altitude platform station in the band 5850–7075 MHz to be used in sharing studies. Annex 10 to Working Party 5C Chairman’s Report, Document 5C/217-E,15 June 2009.
5. Interference analysis modelling for sharing between HAPS gateway links and existing services in the range 5850–7075 MHz. Annex 9 to Working Party 5C Chairman’s Report, Document 5C/217-E, 15 June 2009.