1. V. A. Boriseiko, ?Bound electroelastic oscillations of thick-walled piezoceramic sphere in compressible liquid,? Teplov. Napryazh. Elem. Konstr., No. 12, 111?115 (1972).
2. G. A. Kolomiets and A. F. Ulitko, ?Sound electroelastic oscillations of piezoceramic bodies,? Teplov. Napryazh. Elem. Konstr., No. 8, 15?24 (1969).
3. V. G. Karnaukhov and I. F. Kirichok, ?Numerical solution of problems of the forces oscillation of viscoelastic bodies,? Prikl. Mekh.,10, No. 6, 43?48 (1974).
4. W. P. Mason, Piezoelectric Crystals and Their Application in Ultrasonics [Russian translation], Inostr. Lit., Moscow (1952).
5. N. T. Adelman, Y. Stavssky, and I. E. Segal, Axisymmetric vibrations of radially polarized piezoelectric ceramic cylinders,? J. Sound Vibr.,38, No. 2, 245?254 (1975).