1. 1) http://www.eia.doe.gov/fueloverview.html
2. 2) http://www.world-nuclear.org/info/inf75.html
3. 3) P. J. Ince, US Department of Agriculture, Forest Service, Forest Products Laboratory, General Technical Report FPL 29 (1979).
4. 4) H. Habazaki, T. Tada, K. Wakuda, A. Kawashima, K. Asami and K. Hashimoto, Corrosion, Electrochemistry and Catalysis of Metastable Metals and Intermetallics, C. R. Clayton and K. Hashimoto Eds., the Electrochemical Society pp.393-404 (1993).
5. 5) K. Shimamura, M. Komori, H. Habazaki, T. Yoshida, M. Yamasaki, E. Akiyama, A. Kawashima, K. Asami and K. Hashimoto, Supple. to Mater. Sci. Eng., A226-228, 376 (1997).