1. 1) M. Endo and T. Ueno: Published patent application in Japan, 2005-200676.
2. 2) K. Kato and T. Ueno: Published patent application in Japan, 2006-307358.
3. 3) Metals Handbook, Vol. 2—Properties and Selection: Nonferrous Alloys and Special-Purpose Materials, (ASM International 10th Ed. 1990).
4. 4) ASM Engineered Materials Reference Book, Second Edition, Michael Bauccio, Ed. (ASM International, Materials Park, OH, 1994).