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3. Yu. K. Akimov et al., Semiconductor Detectors for Nuclear Particles and Their Applications [in Russian], Atomizdat, Moscow (1967).
4. S. M. Ryvkin, Fiz. i Tekhn. Poluprov.1, 1628 (1967).
5. G. Ewan, Progress in Nuclear Techniques and Instrumentation, Vol. 3, North Holland Publishing Co., New York-Amsterdam (1968), p. 67.