1. Bureau of Economic Analysis, US Department of Commerce 2009 National economic accounts http://www.bea.gov
2. High finance/low strategy: Corporate collapse in the Canadian pulp and paper industry, 1919-1932;Boothman;Business History Review,2000
3. The collapse of the British toy industry, 1979-1984;Brown;Economic History Review,1993
4. Shifting comparative advantage and senescent industry collapse;Cassing;American Economic Review,1986
5. Dongguan Municipal Bureau of Statistics 2009 Statistics information http://tjj.dg.gov.cn