1. Takeshita, H. Portable Li-ion,worldwide. Proc. Conf. Power 2000, San Diego, 25 September 2000.
2. Ikeda, H., Saito, T. & Tamura, H. in Proc. Manganese Dioxide Symp. Vol. 1 (eds Kozawa, A. & Brodd, R. H.) (IC sample Office, Cleveland, OH, 1975).
3. Steele, B. C. H. in Fast Ion Transport in Solids (ed. Van Gool, W.) 103–109 (North-Holland Amsterdam, 1973).
4. Armand, M. B. in Fast Ion Transport in Solids (ed. Van Gool, W.) 665–673 (North-Holland Amsterdam, 1973).
5. Rouxel, J., Danot, M., & Bichon, M. Les composites intercalaires NaxTiS2. Etude gènérale des phases NaxTiS2 et KxTiS2 . Bull. Soc. Chim. 11, 3930–3936 (1971).