1. O. V. Shereshevskii and A. R. Livenson, in: Advances in Medical Instrument Design [in Russian], Vol. 3, Moscow, (1969), p. 3.
2. O. V. Shereshevskii, ibid., p. 7.
3. D. V. Egorova and O. V. Shereshevskii, ibid., p. 14.
4. J. D. Kraus and R. W. Teed, Electronics,13, 39 (1940).
5. V. V. Tatarinov and G. I. Frenkel', Uhf Electric Fields in Biology and Medicine [in Russian], Leningrad (1939).