1. R. Mittra andG. A. Deschamps:Field Solution for a Dipole in an Anisotropie Medium, in:Symposium on Electromagnetic Theory and Antennas, Copenhagen, June 25–30, 1962, p. 497.
2. P. C. Clemmow:Proceedings I.E.E.E., vol.110 (1963).
3. K. G. Budden:Lectures on Magneto-Ionic Theory (New York, 1964).