1. V. A. Andrushchenko, I. F. Vovkodav, V. L. Karlash, and A. F. Ulitko, “Coefficient of electromechanical coupling in piezoceramic disks,” Int. Appl. Mech., 11, No. 4, 377–382 (1975).
2. Y. Kikuchi, Ultrasonic Transducers, Corona, Tokyo (1969).
3. G. A. Korn and T. M. Korn, Mathematical Handbook for Scientists and Engineers. Definitions, Theorems, and Formulas for Reference and Review, McGraw-Hill, New York (1974).
4. V. N. Lazutkin, Yu. V. Tsyganov, and E. R. Klyushnichenko, “Radial vibrations and electric impedance of piezoceramic rings polarized along height,” in: Piezoelectric Materials and Transducers [in Russian], Izd. RGU, Rostov on Don (1971), pp. 4–9.
5. V. T. Grinchenko, A. F. Ulitko, and N. A. Shul’ga, Electroelasticity, Vol. 5 of the six-volume series Mechanics of Coupled Fields in Structural Members [in Russian], Naukova Dumka, Kyiv (1989).