1. A. V. Gaponov, Izv. Vyssh. Uchebn. Zaved., Radiofiz. 2, 450 (1959).
2. A. V. Gaponov, M. I. Petelin, and V. K. Yulpatov, Izv. Vyssh. Uchebn. Zaved., Radiofiz. 10, 1414 (1967).
3. Applications of High-Power Microwaves, Ed. by A. V. Gaponov-Grekhov and V. L. Granatstein (Artech House, Norwood, 1994).
4. G. S. Nusinovich, Introduction to the Physics of Gyrotrons (Hopkins Univ., Baltimore, 2004).
5. M. Thumm, “State-of-the-art of high power gyrodevices and free electron masers”, KIT Scientific Reports (Institute of Technology, Karlsruhe, 2011), p. KIT–SR7575.