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2. LEP Design Report, vol. III, LEP2, CERN-AC/96-01.
3. G. Cavallari (Ed.), LEP 2000 Status Report, CERN-SL-98-011.
4. P. Bernard, H. Lengeler, E. Picasso, Upgrading of LEP energies by superconducting cavities, in: Proceedings of the ECFA Workshop on LEP 200, Aachen, 1986, p. 29, and CERN LEP Note 524.
5. Conclusions on 8 years operation of the LEP 4.5K refrigeration system at CERN