References
- Lu , B.-W. December 23 1961 . “ On the problem of radio-wave propagation between a point on the ground and a spacecraft, document of the Sixth Symposium on Astronautics ” . In Bureau of New Technology, Academia sinica December 23 , in Chinese
- Kerr , D. E. 1951 . Propagation of Radio Waves , New York : McGraw-Hill Book Co .
- Epstein , P. S. 1930 . “ Reflection of Waves in an Inhomogeneous Absorbing Medium ” . In Proceedings of the National Academy of Sciences Vol. 16 , No. 10