1. Collin, R. E., Foundations for Microwave Engineering, 2nd Ed., 2005.
2. Kalyanasundaram, N., "Large signal field analysis of an O-type traveling wave amplifier. Part 1: Theory," IEE Proc. I, Solid-State & Electron Dev., Vol. 131, No. 5, 145-152, 1984.
doi:10.1049/ip-i-1.1984.0040
3. Kalyanasundaram, N. and R. Chinnadurai, "Large signal field analysis of an O-type traveling wave amplifier. Part 2: Numerical results," IEE Proc. I, Solid-State & Electron Dev., Vol. 133, No. 4, 163-168, 1986.
doi:10.1049/ip-i-1.1986.0031
4. Rowe, J. E., Nonlinear Electron-wave Interaction Phenomena, Academic Press, 1965.
5. Detweiler, H. K. and J. E. Rowe, "Electron dynamics and energy conversion in O-type linear beam devices ," Advances in Microwaves 6, 29-123, 1971.
6. Hughes Aircraft Company, Electron Dynamics Division TWT and TWTA Handbook, 1975.
7. Gewartowski, J. W. and H. A. Watson, Principles of Electron Tubes, Van Nostrand, 1968.