S. Katayama, K. Kawakami and N. Yamada, Ceramic Transactions, 123, 99(2001)
T. Shindou, H. Abe, M. Sugiura, S. Nakamura, K. Kamiya:“Organic-Inorganic Compounds and Their Functionalization”, Int. Conf. Org.& Inorg. Elect. Mat.& Relat. Nano., pp. 26-27(2004).