1. V. E. Golant and M. V. Krivosheev, Anomalous absorption of m-wave power by plasma of supercritical electron density, Soy Phys Tech Phys 14: 789 (1969).
2. D. M. Spero, B. J. Eastlund and M. G. Ury, Apparatus and method for generating radiation, US Pat 3,872, 349 (1975).
3. S. Offermans, Electrodeless high-power microwave discharges, JAppl Phys. 67: 115 (1990).
4. M. G. Ury, B. J. Eastlund, R. S. Braden, and C. H. Wood, Microwave generated radiation apparatus, US Pat 4,042, 850 (1977)
5. D. Lynch, M. Kamarehi, and C. H. Wood, Microwave-powered electrodeless light source utilizing decoupled modes, US Pat 4,749, 915 (1988)