1. 1. K.K.Nichia, D.Kagaku, JPn. Kokai Tokkyo Koho, JP , 82, 23647 (1982).
2. 2. B.M.J. Smets, Mater. Chem. Phys., 16, 283 (1987).
3. 3. Z.P. Chung, G.R. Barsch , IEEE Trans. Sonic. Ultrason. SU, 24, 376 (1987).
4. 4. H. Bassett, W.Bedwell, J. Chem. Soc., 8, 54 (1993).
5. 5. K. Takiyama, Bull. Chem. Soc. Jpn., 31, 950 (1989).