1. Japanese Ministry of Finance, Ministerial ordinance on useful lifetime of depreciable assets, 1965.
2. Collapse of Ynys-y-Gwas bridge, West Glamorgan;Woodward;Proc. Inst. Civ. Eng.,1988
3. The City, the River, the Bridge: Before and After the Minneapolis Bridge Collapse,2011
4. Japanese Ministry of Land, Infrastructure, Transport and Tourism (MLIT), White Paper On Land, Infrastructure, Transport and Tourism in Japan, 2006, Part II, (Chapter 1), Section 2.3, available at http://www.mlit.go.jp/hakusyo/mlit/h18/hakusho/h19/html/i212c000.html.
5. Japanese Ministry of Land, Infrastructure, Transport and Tourism (MLIT), White Paper on Land, Infrastructure, Transport and Tourism in Japan, 2009 (Chapter 1), Section 4.3, available at http://www.mlit.go.jp/english/white-paper/2009.pdf.