1. T.J.T. Kwan, Trapped particle dynamics and efficiency optimization in free-electron lasers. Phys. Fluids 23, 1857 (1980)
2. N.M. Kroll, M.N. Rosenbluth, Sideband instabilities in trapped particle free-electron lasers, in Physics of Quantum Electronics: Free-Electron Generators of Coherent Radiation, ed. by S. F. Jacobs, H. S. Pilloff, M. Sargent, M. O. Scully, R. Spitzer (Eds), vol. 7, (Addison-Wesley, Reading, 1980), p. 147
3. A.T. Lin, Saturation of sideband instabilities in a free-electron laser, in Physics of Quantum Electronics: Free-Electron Generators of Coherent Radiation, ed. by S. F. Jacobs, H. S. Pilloff, M. Sargent, M. O. Scully, R. Spitzer (Eds.), vol. 9, (Addison-Wesley, Reading, 1981), p. 867
4. H.P. Freund, P. Sprangle, C.M. Tang, Effect of fluctuating space-charge fields on sideband instabilities in free-electron lasers. Phys. Rev. A 25, 3121 (1982)
5. C.M. Tang, P. Sprangle, Semi-analytic formulation of the two-dimensional pulse propagation in the free-electron laser oscillator, in Free-Electron Generators of Coherent Radiation, ed. by C. A. Brau, S. F. Jacobs, M. O. Scully (Eds), Proc. SPIE 453 (1984), pp. 11–24