7. V. A. Boriseiko, V. S. Martynenko, and A. F. Ulitko, "Relations of electroelasticity for piezoceramic shells polarized along a coordinate line," Tepl. Napryazh. Elem. Konstr., 20, 3-6 (1980). V. A. Boriseiko, V. S. Martynenko, and A. F. Ulitko, "Relations of electroelasticity for piezoceramic shells of revolution polarized along the meridional coordinate," Prikl. Mekh., 15, No. 12, 36-42 (1979). A. N. Guz', and V. D. Kubenko, Theory of Nonsteady Aerohydroelasticity of Shells, Vol. 5, Methods of the Theory of Shells (5 vols.) [in Russian], Naukova Dumka, Kiev (1982). A. N. Guz' , V. D. Kubenko, and A. E. Babaev, H y d r o e l a s t i c i t y of She l l Systems [ in Russ i an ] , Vishcha Shkola, Kiev (1984). V. A. D i tk in and A. P. Prudnikov, Handbook of Opera t iona l Calculus [ in Russ ian] , Vysshaya Shkola, Moscow (1965). S. I. Pugachev (ed.), Piezoceramic Transducers [in Russian], Sudostroenie, Leningrad (1984).