1. The electron cyclotron maser
2. High Power Gyro-Devices for Plasma Heating and Other Applications
3. High-efficiency wideband gyro-TWTs and gyro-BWOs with helically corrugated waveguides
4. Frequency-Tunable CW Gyro-BWO With a Helically Rippled Operating Waveguide
5. G. G. Denisov, Y. V. Bykov, M. Y. Glyavin, A. G. Luchinin, M. M. Morozkin, and D. I. Sobolev, in Proceedings of the 33rd International Conference on Infrared, Millimeter and Terahertz Waves, Pasadena, CA, USA, 2008.