1. 1Hockmuth,C.M."Darpa'sNonstopFlightTime:FiveYears",AviationWeek,May18,2007.
2. 2DARPANewsRelease,"DARPACompletesAutonomousAirborneRefuelingDemonstration",August9, 2007.
3. 3GlobalHawkRQ-4Block10TechSpecs,URL:http://www.is.northropgrumman.com,NorthropGrumman Corporation, accessed19Dec2007.
4. 5Goraj,Z.,Frydrychewicz,A.,Switkiewicz,R.,Hernik,B.,Gadomski,J.,Goetzendorf-Grabowski,T.,Figat,M., Suchodolski,St.,Chajec,W."HighAltitudeLong Endurance UnmannedAerialVehicleofaNew Generation - a Design Challengefor a LowCost, Reliable, andHigh PerformanceAircraft,"BulletinofthePolishAcademyof Sciences,Vol.52,No.3,2004.