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2. Mathias Heller and Heinrich Klar, “A Transistorized Pulse Current Source for TRAPATT Diodes,” NTZ-Aufsatze, April 4 1975.
3. A.S. Clorfeine, R.D. Hughes and S. Weisbrod, “Low cost Pulsing of Avalanche Diodes,” RCA Review, Vol. 32, September 1971.
4. T.T. Fong W.R. Lane, H.J. Kuno, N.B. Kramer, “High Power W-Band Pulsed IMPATT Oscillators, “Hughes Aircraft Company Electronics Dynamics Division IEEE International Microwave Symposium, Sandiego California, June 1977.
5. U.C. Ray, A.K. Gupta and M.N. Sen, “Frequency Chirp in W-band Pulsed IMPATT Oscillators,” International Journal of Infrared and Millimeter Waves, Vol 10, No. 10, 1989.