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2. V. I. Veksler, Atomnaya Énergiya,2, 427 (1957).
3. A. Buwers, Elektrische Höchstspannungen, Berlin, § 15, S. 83 (1939).
4. O. N. Litvinenko and V. I. Soshnikov, Theory of Nonuniform Lines and Their Use in Radio Technology [in Russian]. Moscow, ?Sovetskoe radio? (1964).