1. Ando, I., M. Irie, K. Kataoka, M. Komiyama, N. Takashima, C. Tanaka, S. Nakagawa and K. Murase; Nyu Porima Saiensu—Kobunshi no Fushigina Hataraki—, ed. by Kobunshi Gakkai, Kodansha, Japan (1993)
2. Hojo, N., H. Shirai, H. Hisayama, Y. Kosaka, A. Shimizu and K. Kosaka; Kireito Jushi·Ion Kokan Jushi—, ed. by N. Hojo, Kodansha, Tokyo, Japan (1986)
3. Contactile Systems of Phosphorylated Polyvinyl Alcohol Films in Metal Ion Aqueous Solution