1. Conference Digest, 22nd International Conference on Infrared and Millimeter Waves, Wintergreen, 1997;Shimozuma,1997
2. 1 MW gyrotron development for a large helical device
3. Conference Digest, 14th International Conference on Infrared and Millimeter Waves, Wurzburg, 1989;Iima,1989
4. Conference Digest, 22nd International Conference on Infrared and Millimeter Waves, Wintergreen 1997;Denison,1997
5. D.R. Denison, Ph.D. Thesis, MIT, Cambridge, MA, USA (1999).