1. A.A. Vlasov, J. Phys. USSR 9, 25 (1945)
2. M. Reiser, Theory and Design of Charged Particle Beams, 2nd edn. (Wiley, Weinheim, 2008)
3. T.P. Wangler, RF Linear Accelerators, 2nd edn. (Wiley, New York, 2008)
4. H. Wiedemann, Particle Accelerator Physics Part III (Springer, Berlin/Heidelberg, 2007), p. 335ff
5. J. Struckmeier, Part. Accel. 45, 229 (1994); also Phys. Rev. E 54, 830 (1996) and Phys. Rev. ST Accel. Beams 3, 034202 (2000)