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								. Ratzinger U, Tiede R. Nuclear Instruments and Methodsin Physics Research, 1998, A415: 229—2352. Ratzinger U. Proc. of the 1991 Particle Accelerator Conf.,567—571 
. Ratzinger U, Tiede R. Nuclear Instruments and Methodsin Physics Research, 1998, A415: 229—2352. Ratzinger U. Proc. of the 1991 Particle Accelerator Conf.,567—571