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2. V. Ya. Vyropaev, JINR 14-9446, Dubna (1976).
3. Yu. N. Burmistenko et al., in: Accelerators [in Russian], Atomizdat, No. 10, Moscow (1968), p. 238.
4. V. N. Tsovbun, JINR 16-7104, Dubna (1973).
5. V. P. Kovalev, Secondary Radiation of Electron Accelerators [in Russian], Atomizdat, Moscow (1979).