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2. Chemistry with Utrasound, Ed. by T. Mason (Elsevier, New York, 1990; Mir, Moscow, 1993).
3. Yu. I. Kitagorodski, in Ultrasonic Technology (Metallurgiya, Moscow, 1974), pp. 220–267 [in Russian].
4. D. A. Gershgal and V. M. Fridman, Ultrasonic Technological Apparatus (Énergiya, Moscow, 1976) [in Russian].
5. Description of the Ultrasonic Generator UZG 3–4 Type (MRTZ Informational Sheet).