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2. O. Klein, S. Donovan, M. Dressel, and G. Grüner,Int. J. Infrared and Millimeter Waves 14 (1993) (preceding article).
3. J. D. Jackson,Classical Electrodynamics (John Wiley & Sons, New York, 1975).
4. C. P. Poole,Electron Spin Resonance (Interscience, New York, 1975), p. 296.
5. C. G. Montgomery,Principles of Microwave Circuits (McGraw-Hill, New York, 1948).