1. T. Okabe and K. Saito, Woodceramics, Metals & Technology 62(1), 34–40 (1992).
2. A. Kuriyama, A Study on the Carbonization Process of Wood, Bull. For. & Prod. Res. Inst., (304), 7–76 (1979).
3. K. Funabiki, M. Nakamura, and M. Tsuriya, Carbonization of Phenolic Resins, Thermosetting Resin 2(4), 220–235 (1981).
4. L.J. Gibson and M.F. Ashby, Cellular Solids (Pergamon Press, 1988), p. 278.
5. L.J. Gibson and M.F. Ashby, ibid., 150 (1988).