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4. See for example: P. Janot, What are the Priorities for LEP in its Final Year; M. Lamont, Strategies for Maximising Energy and Luminosity, in: Proceedings of the Workshop on LEP-SPS Performance - Chamonix X, CERN-SL-2000-07 DI
5. A.A. Sokolov, I.M. Ternov, Sov. Phys. Dokl. 8, 1203 (1964)