7Kadohira M, Stevenson M A, Kanayama T, et al. Epi- demiology of bovine spongiform encephalopathy in cattle in Hokkaido, Japan, between September 2001 and December 2006[J]. Vet Rec., 2008, 163(24): 709-713.
8WHO/FAO. Guidelines for Consumer Organizations to Promote National Food Safety Systems[J]. Safe Food Interna- tional, 2005(9): 1-18.
9Andrew Fearne, Susan HornJbrook, Sandra Dedman. The management of perceived risk in the food supply chain: a comparative study of retailer-led beef quality assurance schemes in Germany and Italy[J]. The International Food and Agribusiness Management Review, 2001, 4(1): 19-36.