1. Berry , L. A. M. E. Chrisman Linear high frequency antennas over a finitely conducting spherical earth Boulder, CO 80302 1966
2. Excitation of an infinite antenna above a dissipative earth;Chang;Radio Sci.,1975
3. Miller , E. K. A. J. Poggio G. J. Burke E. S. Selden Analysis of wire antennas in the presence of a conducting half space, Part II, Tech. Rep Livermore, CA 94550 1971