1. S. V. Vasin and P. Kh. Derkach, ?Vibrations of an elastic spherical shell in contact with a viscous, incompressible liquid over the inner and outer surfaces,? Gidroaeromekh. Teor. Uprugosti, No. 25, 74?81 (1979).
2. S. V. Vasin and N. G. Tamurov, ?Effect of the compressibility of a viscous liquid on free vibrations of an elastic cylindrical shell interacting with the liquid,? Prikl. Mekh.,19, No. 7, 48?54 (1983).
3. A. N. Guz', ?Hydroelasticity problems involving a viscous, compressible liquid in a spherical coordinate system,? Prikl. Mekh.,16, No. 11, 3?10 (1980).
4. T. C. Su, ?The effect of viscosity of free oscillatons of fluid-filled spherical shells,? J. Sound Vibr.,74, No. 2, 205?220 (1981).
5. T. C. Su, ?The effect of viscosity on free vibrations of submerged fluid-filled spherical shells,? J. Sound Vibr.,77, No. 1, 101?125 (1981).