1. Federal Aviation Administration: order 7610.4k. Special military operations (2004)
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3. Federal Aviation Administration: title 14 code of federal regulations (14 cfr) part 91 (2008)
4. Beard, R., McLain, T., Nelson, D., Kingston, D., Johanson, D.: Decentralized cooperative aerial surveillance using fixed-wing miniature UAVs. Proc. I.E.E.E. 94(7), 1306–24 (2006)
5. van Blyenburgh, P.: Unmanned Aircraft Systems: The Global Perspective. UVS International, Paris, France (2007)