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3. R. Schwarte, Electron. Lett.,8, No. 4 (1969).
4. A. I. Naidenov, Transformation of the Nanosecond-Pulse Spectrum [in Russian], Sovetskoe Radio, Moscow (1973).
5. Yu. A. Akimov et al., in: Remote Measurement and Recording of Single High-Speed Processes [in Russian], VNIIOFI, Moscow (1973), p. 178.