Motz, H.; Thon, W.; Whitehurst, R. N. (1953). “Experiments on Radiation by Fast Electron Beams”. 《Journal of Applied Physics》 24 (7): 826. Bibcode:1953JAP....24..826M. doi:10.1063/1.1721389.
Deacon, D. A. G.; Elias, L. R.; Madey, J. M. J.; Ramian, G. J.; Schwettman, H. A.; Smith, T. I. (1977). “First Operation of a Free-Electron Laser”. 《Physical Review Letters》 (Prl.aps.org) 38 (16): 892–894. Bibcode:1977PhRvL..38..892D. doi:10.1103/PhysRevLett.38.892.
Motz, H.; Thon, W.; Whitehurst, R. N. (1953). “Experiments on Radiation by Fast Electron Beams”. 《Journal of Applied Physics》 24 (7): 826. Bibcode:1953JAP....24..826M. doi:10.1063/1.1721389.
Deacon, D. A. G.; Elias, L. R.; Madey, J. M. J.; Ramian, G. J.; Schwettman, H. A.; Smith, T. I. (1977). “First Operation of a Free-Electron Laser”. 《Physical Review Letters》 (Prl.aps.org) 38 (16): 892–894. Bibcode:1977PhRvL..38..892D. doi:10.1103/PhysRevLett.38.892.