1. Whipple,E.C. "Potentialsofsurfacesinspace,ReportsonProgressinPhysics,"vol.44,pp.1197-1250,1981.
2. Hastings,D.,andGarrett,H.B., Spacecraft-EnvironmentInteractions,CambridgeUniversity Press,Cambridge,UK.,1997.
3. Mullen, E.G, Hardy, D.A, Garrett, H.B, Whipple, E.C., P78-2 SCATHA Environmental Data Atlas, inSpacecraft Charging Technology, 1980pp.802-813(NASAReport No. NASA SEE N82-14213-05-18), 1980.
4. Spacecraft charging thresholds in single and double Maxwellian space environments