1. 1) The Ministry of Economy, Trade and Industry: Year book of iron and steel, non-ferrous metals, and fabricated metals statistics, (2004) pp. 217.
2. 2) Japan Aluminum Association: Aluminum statistics, <http://www.aluminum.or.jp/toukei/j-pdf.htm>, (2006/12/18).
3. 3) Japan Light Metal Association: Report of research and investigation for treatment and recycling of aluminum dross, (1996) pp. 7–132.
4. 4) Japan Light Metal Association: Report of research and investigation for treatment and recycling of aluminum dross, (1997).
5. 5) Japan Light Metal Association: Report of research and investigation for treatment and recycling of aluminum dross, (1998).