1. H. Safa, Proceedings of the Seventh European Particle Accelerator Conference, Vienna, Austria, 2000, p. 197.
2. H. Padamsee, J. Knobloch, T. Hays, RF Superconductivity for Accelerators, Wiley, New York, 1998.
3. J.P. Charrier, B. Coadou, B. Visentin, Proceedings of the Sixth European Particle Accelerator Conference, Stockholm, Sweden, 1998, p. 1885.
4. P. Kneisel, Proceedings of the Eighth Workshop on RF Superconductivity, Abano Terme, Italy, 1998, p. 830.
5. P. Kneisel, Proceedings of the Ninth Workshop on RF Superconductivity, Santa Fe, NM, 1999, p. 328.