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http://www.maths.manchester.ac.uk/~peter/MATH20962/
http://blog.livedoor.jp/actuaryjp/
http://www.soa.org/library/newsletters/product-development-news/2009/february/pro-2009-iss73-hatfield.aspx
http://www.actuaries.jp/comm/ERM-256.pdf
http://www.maths.manchester.ac.uk/~peter/MATH20962/
http://blog.livedoor.jp/actuaryjp/
http://www.soa.org/library/newsletters/product-development-news/2009/february/pro-2009-iss73-hatfield.aspx
http://www.actuaries.jp/comm/ERM-256.pdf