1. Physical Principles of Medical Ultrasonics, Ed. by C. R. Hill (Ellis Horwood, Chichester, 1986; Mir, Moscow, 1989).
2. V. Z. Parton and B. A. Kudryavtsev, Electromagnetoelasticity of Piezoelectric and Electrically Conducting Solids (Nauka, Moscow, 1988) [in Russian].
3. G. M. Sverdlin, Hydroacoustic Transducers and Antennas (Sudostroenie, Leningrad, 1980) [in Russian].
4. R. A. Collacot, Mechanical Fault Diagnosis and Condition Monitoring (Chapman and Hall, London, 1977; Mir, Moscow, 1989).
5. V. V. Malov, Piezoresonance Sensors (Énergoizdat, Moscow, 1989) [in Russian].