1. Beckmann , P. A. Spizzichino 1963 The Scattering of Electromagnetic Waves From Rough Surfaces Pergamon Press Oxford, England
2. A reflection theory for propagation beyond the horizon;Friis;Bell System Tech. J.,1957
3. Study of spatial distribution of atmospheric refractivity from aircraft observations;Fukushima;J. Radio Res. Labs.,1965
4. Antenna-beam-deflection loss and signal amplitude correlation in angle-diversity reception in UHF beyond-horizon communications;Koono;J. Radio Res. Labs.,1962